CN113750987A - 一种正交相MoO3电催化剂及其制备方法和应用 - Google Patents
一种正交相MoO3电催化剂及其制备方法和应用 Download PDFInfo
- Publication number
- CN113750987A CN113750987A CN202111086798.2A CN202111086798A CN113750987A CN 113750987 A CN113750987 A CN 113750987A CN 202111086798 A CN202111086798 A CN 202111086798A CN 113750987 A CN113750987 A CN 113750987A
- Authority
- CN
- China
- Prior art keywords
- moo
- electrocatalyst
- preparation
- mixed solution
- orthorhombic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000010411 electrocatalyst Substances 0.000 claims abstract description 34
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001257 hydrogen Substances 0.000 claims abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims abstract description 10
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000002070 nanowire Substances 0.000 claims abstract description 9
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 6
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 6
- 230000015556 catabolic process Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000006731 degradation reaction Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 14
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical group [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 5
- 229940010552 ammonium molybdate Drugs 0.000 claims description 5
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 5
- 239000011609 ammonium molybdate Substances 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 229910003149 α-MoO3 Inorganic materials 0.000 description 22
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000005868 electrolysis reaction Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical class C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 150000001993 dienes Chemical class 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010349 cathodic reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- HTXDPTMKBJXEOW-UHFFFAOYSA-N iridium(IV) oxide Inorganic materials O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/33—Electric or magnetic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/28—Molybdenum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/075—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of a single catalytic element or catalytic compound
- C25B11/077—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
本发明提供一种正交相MoO3电催化剂及其制备方法和应用,所述制备方法包括以下步骤:S1.将钼酸盐、聚乙二醇和水混合,搅拌得到混合溶液;S2.向S1得到的混合溶液中加入浓硝酸,并持续搅拌;S3.将步骤S2得到的混合溶液加入到水热釜内衬中,进行水热反应;S4.冷却至室温,经离心、洗涤和干燥,即得正交相MoO3电催化剂,制得的MoO3电催化剂是直径为200‑300nm,长度为5‑10μm的纳米线形貌,本发明还公开了其在电催化水氧化、产氢和染料降解中的应用,具有较高催化活性的同时能够有效降解环境污染物。
Description
技术领域
本发明属于电催化水氧化技术领域,具体涉及一种正交相MoO3电催化剂及其制备方法和应用。
背景技术
近年来,能源短缺和环境污染问题日益突出,加速了人们对清洁和可再生能源的开发。氢能由于其本身能量高且产物无污染,作为一种清洁能源而被广泛关注。目前,大规模产氢的常规方法主要为电解水、蒸汽重整和煤炭气化等,但是后两者方法会产生大量的CO2,加剧气候变暖;而电解水产物无污染,是一种良好的选择。电催化剂是水电解的关键,作为最有效的电催化剂之一的贵金属,如Pt、RuO2和IrO2已被广泛研究。然而,由于其稀缺性和高成本,其实际应用受到限制。过渡金属氧化物由于其相对较低的成本和稳定性,是取代贵金属的最佳选择。
在过渡金属氧化物中,三氧化钼(MoO3)由于其结构和功能的多样性而受到广泛关注。在已有报道中,江俊等人公开了一种黑色三氧化钼纳米片的制备方法和应用(公布号:CN112694125A),该发明主要应用在太阳能驱动海水淡化,但制备方案复杂;此外,魏世忠等人报道了一种光催化降解用纳米MoO3粉末的制备方法(申请公布号:CN108786786A),该发明主要将MoO3应用在光催化降解领域。
另一方面,有机染料废水含有稳定的多环芳烃,难以自然降解,因此,染料废水排放,对环境和生态造成严重影响。马国峰等人和汪尧进等人分别报道了电催化降解有机废水催化剂制备方法(申请公布号:CN106669678A)和挠曲电催化降解含染料废水的方法(申请公布号:CN110510701A),两者发明虽然都对工业废水进行了有效的降解,但是无法得到具有高附加值的氢能源。本发明,不但可以降解有机染料污染物,而且可以同时实现低电压下产氢。本发明,提供了一种环保、节能的新策略,有望直接利用工业废水,实现产氢和废水净化。因此,具有明显的实际应用价值。
调研表明,还未有人将不同晶相的MoO3(正交相:α-MoO3和六方相:h-MoO3)进行电解水的报道。
发明内容
为解决上述电催化中贵金属稀缺、价格高的技术问题,本发明提供一种正交相MoO3电催化剂及其制备方法和应用。
本发明采用如下技术方案:
一种正交相MoO3电催化剂的制备方法,包括以下步骤:
S1.将钼酸盐、聚乙二醇和水混合,搅拌得到混合溶液;
S2.向S1得到的混合溶液中加入浓硝酸,并持续搅拌;
S3.将步骤S2得到的混合溶液加入到水热釜内衬中,进行水热反应;
S4.冷却至室温,经离心、洗涤和干燥,即得正交相MoO3电催化剂。
进一步地,步骤S1将所述钼酸盐是钼酸铵。
进一步地,步骤S1中将1.23g钼酸铵、0.4g聚乙二醇和30mL水混合;步骤S2加入5mL浓度为65-68%的浓硝酸;步骤S3在160℃下恒温水热反应24h。
一种所述制备方法制备得到的正交相MoO3电催化剂,所述正交相MoO3电催化剂的形貌是纳米线,纳米线的直径为200-300nm,长度为5-10μm。
所述正交相MoO3电催化剂在电催化水氧化中的应用。
所述正交相MoO3电催化剂在产氢和染料降解中的应用。
本发明的有益效果:
(1)本发明提供一种正交相氧化钼α-MoO3在电催化水氧化、电催化产氢和污染物分解上的应用,应用于电催化水氧化时,在450mV的过电位下,α-MoO3的阳极电流密度是h-MoO3的2.8倍,具有较高的阳极析氧反应活性,大大促进了电解水的性能;
(2)要达到40mA/cm-2,KOH体系的池电压为1.93V,而加入有机物的MB/KOH体系的池电压仅为1.597V,电池电压降低了17.56%,提高了电解水效率,这表明一定的有机物MB含量能够提高体系的催化活性,并且随着电解过程的进行,有机物MB和共轭二烯的结构被破坏,苯基衍生物形成,表明MB被有效降解,综上,在低压高效电解水的同时,有效的降解了环境污染物。
附图说明
图1是制备的钼基电催化剂h-MoO3和α-MoO3的XRD图;
图2是制备的(a)h-MoO3和(b)α-MoO3电催化剂的SEM图;
图3是制备的h-MoO3和α-MoO3电催化剂在1MKOH中的电催化性能测试;
图4是h-MoO3和α-MoO3电催化剂在1MKOH的电流密度柱状图;
图5是制备的α-MoO3电催化剂分别在1MKOH和1MKOH+10mg/LMB的电催化性能测试;
图6是α-MoO3电催化剂分别在1MKOH和1MKOH+10mg/LMB的电流密度柱状图;
图7是不同操作时间KOH/MB溶液的紫外-可见光谱图谱。
具体实施方式
以下结合实施例对本发明作进一步的描述,实施例仅用于对本发明进行说明,并不构成对权利要求范围的限制,本领域技术人员可以想到的其他替代手段,均在本发明权利要求范围内。
实施例1
一种正交相MoO3电催化剂的制备方法,包括以下步骤:
S1.将1.23g钼酸盐、0.4g聚乙二醇和30mL水混合,搅拌30min得到混合溶液;
S2.向S1得到的混合溶液中加入5ml浓度为65%-68%的浓硝酸,并持续搅拌30min;
S3.将步骤S2得到混合溶液加入到50mL水热釜内衬中,在160℃下恒温进行水热反应24小时;
S4.冷却至室温,经离心、乙醇洗涤、水洗涤和干燥,即得α-MoO3电催化剂,如图1下半部分所示,与α-MoO3标准卡(JCPDS: 89-7112)一致,制得的α-MoO3电催化剂的形貌是纳米线,如图2(b)所示,纳米线的直径为200-300nm,长度为5-10μm。
对比例1
将2.43g的钼酸铵加入到盛有10mL水溶液的烧杯中,搅拌15分钟;然后加入5ml浓度为65%-68%的硝酸,搅拌半小时后,转移到50ml聚四氟乙烯内衬中,180℃恒温水热反应3小时;反应3小时后,自然冷却至室温,用水洗涤、离心、干燥,产物即为h-MoO3,如图1上半部分所示,与h-MoO3标准卡 ( JCPDS: 21-0569)一致,如图2(a)所示,制得的h-MoO3直径为2-5μm、长度为20-30μm左右。
应用于电催化水氧化的测试:
将实施例1制得的α-MoO3电催化剂、乙炔黑与聚偏氟乙烯以质量比为8:1:1混合,将1g混合粉料分散在2mL的1-甲基-2-吡咯烷酮中,在搅拌下形成均匀的浆液。将浆料涂覆在泡沫镍上,然后在室温下干燥24小时,涂覆面积为1cm×1cm,得到α-MoO3电极;对比例制得的h-MoO3的电极制备同上。以上述制得的电极材料作阳极,铂丝作对电极,Ag/AgCl为参比电极,在此三电极体系,施加一定的电压,在1MKOH中进行电催化性能测试。
由图3可见,α-MoO3电极比h-MoO3具有更高的电流和起始电位,表明其具有更高的水氧化内在电催化活性。图4显示了不同过电位下的电流密度,在过电位为250mV、350mV和450mV时,α-MoO3电极的电流密度分别为2.38 mAcm-2、19.06 mAcm-2和99.4mAcm-2,明显高于h-MoO3电极(0.67 mAcm-2、12.68 mAcm-2和34.87mAcm-2)。其中,在450mV时,α-MoO3电极的电流密度是h-MoO3的2.8倍,这是因为相结构影响过渡金属氧化物的活性差异,α-MoO3电极较高的阳极析氧反应活性,促进了电解水的性能,因此,α-MoO3作为电催化剂,具有良好的应用前景。
应用于产氢和染料降解的测试:
将制得的α-MoO3电催化剂和乙炔黑与聚偏氟乙烯以质量比为8:1:1混合,将1g混合粉料分散在2mL的1-甲基-2-吡咯烷酮中,在搅拌下形成均匀的浆液。将浆料涂覆在泡沫镍上,然后在室温下干燥24小时,涂覆面积为1cm×1cm,得到α-MoO3电极。
以上述制得的α-MoO3电极作阳极,铂丝作对电极,Ag/AgCl为参比电极,在此三电极体系,施加一定的电压,分别在1MKOH和1MKOH+10mg/LMB中进行电催化性能测试。由图5可见,MB的加入大幅降低了电解水的过电位。对于阳极氧化反应,在KOH电解体系中,水氧化反应需要1.611V的高压才能达到40mAcm-2,而KOH/MB电解体系只要1.349V就能达到40mAcm-2。如图6所示,对于阴极反应,电解KOH系统和KOH/MB系统的HER分别需要-0.319V和-0.242V的电压达到40mAcm-2。要达到40mA/cm-2,KOH体系的池电压为1.93V,而MB/KOH体系的池电压仅为1.597V,电池电压降低了17.56%,进而提高了电解水效率。
如图7所示,测量了KOH/MB溶液在不同操作时间的紫外-可见光谱,在可见光区,1MKOH/10mg/LMB溶液出现两个吸收峰,分别位于610nm和664nm。在紫外区域,两个峰分别位于219nm和283nm。610nm和664nm处的吸收峰是MB的特征吸收峰,而219nm和283nm处的吸收峰分别归因于共轭二烯和醛结构。此外,241nm处的吸收峰是苯环形成的。结果表明,随着电解过程的进行,610nm和664nm处的吸收峰明显减小,219nm和283nm处的吸收峰消失,241nm处的吸收峰出现,表明MB和共轭二烯的结构被破坏,苯基衍生物形成。2h后,可见光范围内的峰明显减小,仅在241nm处有峰。以上结果表明MB已被有效降解,但仍存在一些中间产物(苯衍生物),这是MB降解的常见现象。综上所述,很明显我们的设计是节能的,在低压高效电解水的同时,有效的降解了环境污染物。
应说明的是,以上实施例仅用以说明本发明的技术方案而非限制,尽管参照较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的精神和范围,其均应涵盖在本发明的权利要求范围当中。
Claims (6)
1.一种正交相MoO3电催化剂的制备方法,其特征在于:包括以下步骤:
S1.将钼酸盐、聚乙二醇和水混合,搅拌得到混合溶液;
S2.向S1得到的混合溶液中加入浓硝酸,并持续搅拌;
S3.将步骤S2得到的混合溶液加入到水热釜内衬中,进行水热反应;
S4.冷却至室温,经离心、洗涤和干燥,即得正交相MoO3电催化剂。
2.根据权利要求1所述的正交相MoO3电催化剂的制备方法,其特征在于:步骤S1将所述钼酸盐是钼酸铵。
3.根据权利要求1所述的正交相MoO3电催化剂的制备方法,其特征在于:步骤S1中将1.23g钼酸铵、0.4g聚乙二醇和30mL水混合;步骤S2加入5mL浓度为65-68%的浓硝酸;步骤S3在160℃下恒温水热反应24h。
4.一种权利要求1所述制备方法制备得到的正交相MoO3电催化剂,其特征在于:所述正交相MoO3电催化剂的形貌是纳米线,纳米线的直径为200-300nm,长度为5-10μm。
5.权利要求4所述正交相MoO3电催化剂在电催化水氧化中的应用。
6.权利要求4所述正交相MoO3电催化剂在产氢和染料降解中的应用。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111086798.2A CN113750987A (zh) | 2021-09-16 | 2021-09-16 | 一种正交相MoO3电催化剂及其制备方法和应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111086798.2A CN113750987A (zh) | 2021-09-16 | 2021-09-16 | 一种正交相MoO3电催化剂及其制备方法和应用 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN113750987A true CN113750987A (zh) | 2021-12-07 |
Family
ID=78796008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111086798.2A Pending CN113750987A (zh) | 2021-09-16 | 2021-09-16 | 一种正交相MoO3电催化剂及其制备方法和应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113750987A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114318397A (zh) * | 2021-12-07 | 2022-04-12 | 南京信息工程大学 | 一种钼基电催化剂及其制备方法和双功能电解池及其应用 |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102086302A (zh) * | 2009-12-04 | 2011-06-08 | 复旦大学 | 一种制备钼氧化物-聚苯胺复合纳米线及纳米管的方法 |
CN102139923A (zh) * | 2011-04-29 | 2011-08-03 | 西安工程大学 | 一种制备正交相单晶纳米带结构三氧化钼材料的方法 |
CN107335433A (zh) * | 2017-08-08 | 2017-11-10 | 郑州大学 | 一种氧化钼基高效电催化析氢催化剂的制备方法 |
US20170349447A1 (en) * | 2016-05-23 | 2017-12-07 | University Of Connecticut | Mesoporous metal oxides, preparation and applications thereof |
CN109908888A (zh) * | 2019-04-10 | 2019-06-21 | 航天科工智慧产业发展有限公司 | MoO3/纳米石墨阳极电催化降解水中头孢他啶的方法 |
CN110205645A (zh) * | 2019-04-23 | 2019-09-06 | 电子科技大学 | 5-羟甲基糠醛电氧化为阳极反应的全水解装置及反应方法 |
CN110357160A (zh) * | 2019-08-29 | 2019-10-22 | 合肥工业大学 | 一种网络状非晶氧化钼纳米材料及其制备方法和应用 |
CN111644195A (zh) * | 2020-07-01 | 2020-09-11 | 济南大学 | 一种电催化降解肼类环境污染物同时产氢的催化剂的制备方法 |
CN112209476A (zh) * | 2020-10-21 | 2021-01-12 | 新疆大学 | 一种应用低维氧化锌纳米材料进行压电催化降解有机染料的方法 |
CN112538636A (zh) * | 2019-09-20 | 2021-03-23 | 中国科学院宁波材料技术与工程研究所 | 一种电催化5-羟甲基糠醛氧化制备2,5-呋喃二甲酸同时电解水制氢气的方法 |
CN113181898A (zh) * | 2021-03-31 | 2021-07-30 | 南京信息工程大学 | 一种低温降解低密度聚乙烯的催化剂及其应用 |
-
2021
- 2021-09-16 CN CN202111086798.2A patent/CN113750987A/zh active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102086302A (zh) * | 2009-12-04 | 2011-06-08 | 复旦大学 | 一种制备钼氧化物-聚苯胺复合纳米线及纳米管的方法 |
CN102139923A (zh) * | 2011-04-29 | 2011-08-03 | 西安工程大学 | 一种制备正交相单晶纳米带结构三氧化钼材料的方法 |
US20170349447A1 (en) * | 2016-05-23 | 2017-12-07 | University Of Connecticut | Mesoporous metal oxides, preparation and applications thereof |
CN107335433A (zh) * | 2017-08-08 | 2017-11-10 | 郑州大学 | 一种氧化钼基高效电催化析氢催化剂的制备方法 |
CN109908888A (zh) * | 2019-04-10 | 2019-06-21 | 航天科工智慧产业发展有限公司 | MoO3/纳米石墨阳极电催化降解水中头孢他啶的方法 |
CN110205645A (zh) * | 2019-04-23 | 2019-09-06 | 电子科技大学 | 5-羟甲基糠醛电氧化为阳极反应的全水解装置及反应方法 |
CN110357160A (zh) * | 2019-08-29 | 2019-10-22 | 合肥工业大学 | 一种网络状非晶氧化钼纳米材料及其制备方法和应用 |
CN112538636A (zh) * | 2019-09-20 | 2021-03-23 | 中国科学院宁波材料技术与工程研究所 | 一种电催化5-羟甲基糠醛氧化制备2,5-呋喃二甲酸同时电解水制氢气的方法 |
CN111644195A (zh) * | 2020-07-01 | 2020-09-11 | 济南大学 | 一种电催化降解肼类环境污染物同时产氢的催化剂的制备方法 |
CN112209476A (zh) * | 2020-10-21 | 2021-01-12 | 新疆大学 | 一种应用低维氧化锌纳米材料进行压电催化降解有机染料的方法 |
CN113181898A (zh) * | 2021-03-31 | 2021-07-30 | 南京信息工程大学 | 一种低温降解低密度聚乙烯的催化剂及其应用 |
Non-Patent Citations (2)
Title |
---|
ANUKORN PHURUANGRAT ET AL.: "Electrochemical hydrogen evolution over MoO3 nanowires produced by microwave-assisted hydrothermal reaction", 《ELECTROCHEMISTRY COMMUNICATIONS》, vol. 11, pages 1740 * |
PEIPEI SUN ET AL.: "Effect of the phase structure on the catalytic activity of MoO3 and potential application for indoor clearance", 《JOURNAL OF MATERIALS CHEMISTRY C》, vol. 8, no. 7, pages 2476 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114318397A (zh) * | 2021-12-07 | 2022-04-12 | 南京信息工程大学 | 一种钼基电催化剂及其制备方法和双功能电解池及其应用 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107952464B (zh) | 一种新型光催化材料及双光催化电极自偏压污染控制系统 | |
CN110681404A (zh) | 一种用于电解水阴极析氢反应的片状碳化钼催化剂及其制备方法和应用 | |
Ren et al. | A cost-effective birnessite–silicon solar cell hybrid system with enhanced performance for dye decolorization | |
Zheng et al. | Interaction between InP and SnO2 on TiO2 nanotubes for photoelectrocatalytic reduction of CO2 | |
CN114941155A (zh) | 一种双功能电解池的制备工艺 | |
CN113750987A (zh) | 一种正交相MoO3电催化剂及其制备方法和应用 | |
Lv et al. | N/C doped nano-size IrO2 catalyst of high activity and stability in proton exchange membrane water electrolysis | |
CN117230475A (zh) | 一种Ni、Mn双金属电催化剂的制备方法及其小分子电氧化应用 | |
CN114934284B (zh) | 用于电催化还原二氧化碳的酞菁镍修饰果皮碳框架催化剂及其制备方法和应用 | |
CN115821319A (zh) | 一种八面体Cu2O/CuO异质结催化剂及其制备方法和应用 | |
CN113106470B (zh) | 一种适用于电化学氮还原的钒掺杂二氧化钛/石墨烯电催化剂及其制备方法 | |
CN110065932B (zh) | 一种锂插入式硒类化合物、其制备方法及应用 | |
CN114481209A (zh) | 一种Ru修饰铁基自支撑析氢电极的制备方法 | |
CN114959771B (zh) | 一种镍基电催化剂及产氢协同降解甲醛废水电解池 | |
CN112458489B (zh) | 一种新型催化剂材料及其制备方法和应用 | |
CN115652357B (zh) | 一种硫掺杂的钌酸钇及其制备方法和析氧反应电极 | |
CN112626553B (zh) | 一种空心碳管复合材料及其制备方法与应用 | |
CN104073840B (zh) | 一种镍-锌-铝/碳纤维复合材料的制备方法 | |
CN114976077B (zh) | 一种亚-2 nm超小Pt纳米立方块阵列及其制备方法与应用 | |
CN114232017B (zh) | 一种硒化银纳米催化剂及其制备方法和应用 | |
CN116334689B (zh) | 一种PVP改性NiMoS电催化剂及其制备方法 | |
Deng et al. | Efficient electrocatalytic reduction of N2 to ammonia at ambient conditions with municipal sludge-derived porous carbon codoped with multiple heteroatoms | |
CN118047412A (zh) | 一种立方体铜基异质结催化剂及其制备方法和应用 | |
CN116623226A (zh) | 一种金属改性碳化钨电催化剂的制备方法和应用 | |
CN118125493A (zh) | 一种切角八面体铜基异质结催化剂及其制备方法和应用 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211207 |