CN112915997B - 一种碳负载高分散贵金属催化剂的制备方法 - Google Patents
一种碳负载高分散贵金属催化剂的制备方法 Download PDFInfo
- Publication number
- CN112915997B CN112915997B CN201911242193.0A CN201911242193A CN112915997B CN 112915997 B CN112915997 B CN 112915997B CN 201911242193 A CN201911242193 A CN 201911242193A CN 112915997 B CN112915997 B CN 112915997B
- Authority
- CN
- China
- Prior art keywords
- noble metal
- carbon
- metal catalyst
- highly dispersed
- catalyst according
- 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.)
- Active
Links
- 229910000510 noble metal Inorganic materials 0.000 title claims abstract description 92
- 239000003054 catalyst Substances 0.000 title claims abstract description 50
- 239000006185 dispersion Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 239000010453 quartz Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 239000002243 precursor Substances 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- 125000004429 atom Chemical group 0.000 claims abstract description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 24
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 14
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 13
- 239000010931 gold Substances 0.000 claims description 13
- 239000010970 precious metal Substances 0.000 claims description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 239000010948 rhodium Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052741 iridium Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 description 5
- 229910021393 carbon nanotube Inorganic materials 0.000 description 4
- 239000002041 carbon nanotube Substances 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910004042 HAuCl4 Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910021604 Rhodium(III) chloride Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- 229910021397 glassy carbon Inorganic materials 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- HTXDPTMKBJXEOW-UHFFFAOYSA-N iridium(IV) oxide Inorganic materials O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910021392 nanocarbon Inorganic materials 0.000 description 1
- 239000002113 nanodiamond Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(IV) oxide Inorganic materials O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000000126 substance Substances 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/46—Ruthenium, rhodium, osmium or iridium
- B01J23/462—Ruthenium
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/46—Ruthenium, rhodium, osmium or iridium
- B01J23/468—Iridium
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/48—Silver or gold
- B01J23/50—Silver
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/48—Silver or gold
- B01J23/52—Gold
-
- 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
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/394—Metal dispersion value, e.g. percentage or fraction
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/084—Decomposition of carbon-containing compounds into carbon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Catalysts (AREA)
Abstract
一种碳负载高分散贵金属催化剂的制备方法,将贵金属前驱体放置于管式炉的石英反应管中,加热到贵金属熔点温度的一半以上,使贵金属达到表面熔化状态,通入甲烷等含碳气体,使含碳气体热解产生碳和氢气,让贵金属表面熔化的原子自由扩散迁移到新生成的碳的不饱和位点,形成稳定的碳负载的高分散贵金属催化剂。本方法操作简便,普适性强,利用本方法制备的催化剂可以实现贵金属在碳载体上的原子级分散,并且具有很高的热稳定性。
Description
技术领域
本发明涉及催化剂制备技术领域,具体涉及高分散贵金属催化剂制备技术领域。
背景技术
由于贵金属催化剂的催化性能存在着显著的纳米尺寸效应和形貌效应,制备和维持特定纳米尺寸及形貌的贵金属催化剂成为其发挥优越催化活性的关键,加之贵金属昂贵的成本,贵金属物种在载体表面的高度分散和结构稳定成为负载型贵金属催化剂制备领域的研究重点。
碳负载贵金属催化剂凭借其优异的催化性能被广泛应用于催化加氢、催化氧化等重要化工领域以及燃料电池催化剂等领域。同时,碳材料作为负载型贵金属催化剂载体具有便于贵金属组分易于回收再利用的优势。传统碳材料主要包括活性炭、碳黑、天然石墨和焦炭等,新型碳材料主要包括碳纤维、石墨层间化合物、多孔碳、玻璃碳和柔性石墨等,纳米碳材料主要包括石墨烯、碳纳米管、富勒烯和纳米金刚石等。碳载体类型不同则其比表面积和表面性质均存在差异,这使贵金属物种在碳载体表面的分散程度也不同。其中,碳纳米管因其较大的比表面积、较少的杂质残留量和较高的石墨化程度可以实现对贵金属较好的分散,但碳纳米管复杂的制备工艺和昂贵的价格制约了其广泛应用。
根据孔道的不同,常规碳载体又可以分为微孔、介孔和大孔。而常见的碳载体负载贵金属催化剂制备方法包括微波法(International Journal of Hydrogen Energy,2017,42,11622;ACS Appl.Mater.Interfaces,2016,8,33673)、浸渍法(CN107754792A,CN102658133A,CN103691428A)、气相沉积法(Applied Physics Express,2019,12)和原子层沉积法(Advanced Materials Interfaces,2018,5)。采用微波法制备的催化剂,贵金属主要集中分散在碳载体的表面,但贵金属颗粒较大且难以实现贵金属的均匀分散;而采用浸渍法制备的催化剂,碳载体微孔和介孔内的贵金属含量较高,贵金属颗粒堵塞孔道限制了活性中心与反应物的接触,同时通过浸渍法制备的催化剂贵金属物种难以实现贵金属的单一物种分散,贵金属多物种共存不利于提高催化反应的选择性;而通过气相沉积法和原子层沉积法虽可以获得高度分散的贵金属催化剂,但此类方法均需要比较昂贵的贵金属前驱体,制备成本非常高。
现有碳载体材料和方法虽然提供了碳负载贵金属催化剂的有效途径,但仍然存在制备过程复杂,贵金属利用率低,热稳定性差,高温易烧结团聚长大等问题。
发明内容
为解决现有碳载贵金属催化剂存在的上述问题,本发明提供了一种简易的方法制备耐高温的碳负载高分散贵金属催化剂制备方法。
本发明为实现上述目的所采用的技术方案是:将贵金属前驱体放置于管式炉的石英反应管中,加热到贵金属熔点温度的一半以上,使贵金属达到表面熔化状态,通入甲烷等含碳气体,使含碳气体热解产生碳和氢气,让贵金属表面熔化的原子自由扩散迁移到新生成的碳的不饱和位点,形成稳定的碳负载的高分散贵金属催化剂。
所述贵金属包括钌、铑、钯、银、铱、铂、金,所述贵金属前驱体包括所述贵金属的粉末、所述贵金属的氧化物,以及所述贵金属的硝酸盐、氯化盐、醋酸盐和草酸盐。
所述放置于石英反应管中的贵金属前驱体包括所述贵金属的一种或两种以上,从而获得碳负载的相应的单一贵金属催化剂或双贵金属和多贵金属催化剂。
所述含碳气体包括甲烷、碳2到碳6的烷烃或烯烃的一种或两种以上。
加热温度在600摄氏度到1200摄氏度之间,优选温度为比所述贵金属熔点温度的一半高50到100摄氏度。
加热时间为1到24小时,优选时间为4-6小时。
所述含碳气体的时空速度为6-600升每克贵金属每小时,优选时空速度为12-120升每克贵金属每小时。
附图说明
图1是本发明实施例1制得的Pt含量为0.2wt%的Pt/C催化剂的电镜照片。
图2是本发明实施例2制得的Ag含量为0.5wt%的Ag/C催化剂的电镜照片。
具体实施方式
实施例1,将1g贵金属Pt的金属粉末放置于管式炉的石英反应管中,加热到850摄氏度,然后通入甲烷气体,甲烷流速12L/h,反应6小时后,停止供气和加热,自然降至室温,取出后分离剩余的贵金属Pt粉末和新生成的碳,得到Pt含量为0.2wt%的Pt/C催化剂。
实施例2,将1g贵金属Ag粉末放置于管式炉的石英反应管中,加热到850摄氏度,然后通入乙烷气体,乙烷流速12L/h,反应9小时后,停止供气和加热,自然降至室温,取出后分离剩余的贵金属Ag粉末和新生成的碳,得到Ag含量为0.5wt%的Ag/C催化剂。
实施例3,将2g贵金属RuO2粉末放置于管式炉的石英反应管中,加热到1000摄氏度,然后通入甲烷气体,甲烷流速12L/h,反应9小时后,停止供气和加热,自然降至室温,取出后分离剩余的被还原成金属态的Ru粉末和新生成的碳,得到Ru含量为0.3wt%的Ru/C催化剂。
实施例4,将2g RhCl3粉末放置于管式炉的石英反应管中,加热到900摄氏度,然后通入甲烷气体,甲烷流速12L/h,反应12小时后,停止供气和加热,自然降至室温,取出后分离剩余的被还原成金属态的Ru粉末和新生成的碳,得到Rh含量为0.3wt%的Rh/C催化剂。
实施例5,将1g贵金属Pd粉末放置于管式炉的石英反应管中,加热到800摄氏度,然后通入甲烷气体,甲烷流速24L/h,反应9小时后,停止供气和加热,自然降至室温,取出后分离剩余的贵金属Pd粉末和新生成的碳,得到Pd含量为0.4wt%的Pd/C催化剂。
实施例6,将1g IrO2粉末放置于管式炉的石英反应管中,加热到1200摄氏度,然后通入甲烷气体,甲烷流速12L/h,反应6小时后,停止供气和加热,自然降至室温,取出后分离剩余的被还原成金属态的Ir粉末和新生成的碳,得到Ir含量为0.3wt%的Ir/C催化剂。
实施例7,将2g HAuCl4粉末放置于管式炉的石英反应管中,加热到850摄氏度,然后通入甲烷气体,甲烷流速12L/h,反应12小时后,停止供气和加热,自然降至室温,取出后分离剩余的被还原成金属态的Au粉末和新生成的碳,得到Au含量为0.6wt%的Au/C催化剂。
实施例8,将0.5g由实施例7中分离回收的金属态Au的粉末放置于管式炉的石英反应管中,加热到850摄氏度,然后通入甲烷气体,甲烷流速6L/h,反应12小时后,停止供气和加热,自然降至室温,取出后分离剩余的Au粉末和新生成的碳,得到Au含量为0.6wt%的Au/C催化剂。
实施例9,将0.5g由实施例2中分离回收的贵金属Ag粉末放置于管式炉的石英反应管中,加热到850摄氏度,然后通入甲烷气体,甲烷流速6L/h,反应9小时后,停止供气,加热继续保持4小时,自然降至室温,取出后分离未反应的贵金属Ag粉末和新生成的碳,得到Ag含量为0.7wt%的Ag/C催化剂。
实施例10,将1g贵金属Ag粉末和1g贵金属Au粉末混合后放置于管式炉的石英反应管中,加热到850摄氏度,然后通入甲烷气体,甲烷流速24L/h,反应6小时后,停止供气和加热,自然降至室温,取出后分离剩余的贵金属Ag和Au的混合粉末和新生成的碳,得到Ag含量为0.4wt%,Au含量为0.3wt%的Ag-Au/C催化剂。
实施例11,将1g贵金属Pt粉末和1g贵金属Pd粉末混合后放置于管式炉的石英反应管中,加热到850摄氏度,然后通入甲烷气体,甲烷流速24L/h,反应12小时后,停止供气和加热,自然降至室温,取出后分离剩余的贵金属Pt和Pd的混合粉末和新生成的碳,得到Pt含量为0.3wt%,Pd含量为0.6wt%的Pt-Pd/C催化剂。
Claims (9)
1.一种碳负载高分散贵金属催化剂的制备方法,其特征在于:将贵金属前驱体放置于管式炉的石英反应管中,加热到贵金属熔点温度的一半以上,使贵金属达到表面熔化状态,通入含碳气体,使含碳气体热解产生碳和氢气,让贵金属表面熔化的原子自由扩散迁移到新生成的碳的不饱和位点,形成稳定的碳负载的高分散贵金属催化剂。
2.根据权利要求1所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:所述贵金属包括钌、铑、钯、银、铱、铂、金中的一种或二种以上,所述贵金属前驱体包括所述贵金属的粉末、所述贵金属的氧化物、以及所述贵金属的硝酸盐、氯化盐、醋酸盐和草酸盐中的一种或二种以上。
3.根据权利要求1所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:所述放置于石英反应管中的贵金属前驱体包括所述贵金属的一种或两种以上,从而获得碳负载的相应的单一贵金属催化剂或双贵金属和多贵金属催化剂。
4.根据权利要求1所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:所述含碳气体包括甲烷、碳2到碳6的烷烃或烯烃中的一种或两种以上。
5.根据权利要求1所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:加热温度在600摄氏度到1200摄氏度之间,比所述贵金属熔点温度的一半 高50到100摄氏度。
6.根据权利要求1所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:加热反应时间为1到24小时。
7.根据权利要求6所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:加热反应时间为4-6小时。
8.根据权利要求1、4或6所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:所述含碳气体的时空速度为6-600升/每克贵金属每小时。
9.根据权利要求1所述的碳负载高分散贵金属催化剂的制备方法,其特征在于:所述含碳气体的时空速度为12-120升/每克贵金属每小时。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911242193.0A CN112915997B (zh) | 2019-12-06 | 2019-12-06 | 一种碳负载高分散贵金属催化剂的制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911242193.0A CN112915997B (zh) | 2019-12-06 | 2019-12-06 | 一种碳负载高分散贵金属催化剂的制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN112915997A CN112915997A (zh) | 2021-06-08 |
CN112915997B true CN112915997B (zh) | 2022-04-12 |
Family
ID=76161565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911242193.0A Active CN112915997B (zh) | 2019-12-06 | 2019-12-06 | 一种碳负载高分散贵金属催化剂的制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112915997B (zh) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200800397A (en) * | 2006-06-01 | 2008-01-01 | Ritek Corp | Method of preparing catalyst for catalyzing carbon nanotubes growth |
CN104923275A (zh) * | 2015-06-01 | 2015-09-23 | 常州大学 | 一种多孔炭负载金属碳化物的方法 |
CN106512991A (zh) * | 2016-10-28 | 2017-03-22 | 北京石油化工学院 | 一种负载型贵金属催化剂的制备方法 |
CN107930672A (zh) * | 2017-12-04 | 2018-04-20 | 北京化工大学 | 一种金属呈原子级分散的金属‑氮碳材料、其制备方法和用途 |
CN108097244A (zh) * | 2016-11-24 | 2018-06-01 | 中国科学院大连化学物理研究所 | 一种高分散抗烧结负载型钌催化剂的制备及催化剂和应用 |
KR101881949B1 (ko) * | 2017-01-20 | 2018-07-26 | 한국해양대학교 산학협력단 | 금속원자가 도핑된 유기금속-탄소 복합체 및 그 제조방법 |
CN109382106A (zh) * | 2017-08-03 | 2019-02-26 | 中国科学院大连化学物理研究所 | 一种电还原二氧化碳催化材料及其制备和应用 |
-
2019
- 2019-12-06 CN CN201911242193.0A patent/CN112915997B/zh active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200800397A (en) * | 2006-06-01 | 2008-01-01 | Ritek Corp | Method of preparing catalyst for catalyzing carbon nanotubes growth |
CN104923275A (zh) * | 2015-06-01 | 2015-09-23 | 常州大学 | 一种多孔炭负载金属碳化物的方法 |
CN106512991A (zh) * | 2016-10-28 | 2017-03-22 | 北京石油化工学院 | 一种负载型贵金属催化剂的制备方法 |
CN108097244A (zh) * | 2016-11-24 | 2018-06-01 | 中国科学院大连化学物理研究所 | 一种高分散抗烧结负载型钌催化剂的制备及催化剂和应用 |
KR101881949B1 (ko) * | 2017-01-20 | 2018-07-26 | 한국해양대학교 산학협력단 | 금속원자가 도핑된 유기금속-탄소 복합체 및 그 제조방법 |
CN109382106A (zh) * | 2017-08-03 | 2019-02-26 | 中国科学院大连化学物理研究所 | 一种电还原二氧化碳催化材料及其制备和应用 |
CN107930672A (zh) * | 2017-12-04 | 2018-04-20 | 北京化工大学 | 一种金属呈原子级分散的金属‑氮碳材料、其制备方法和用途 |
Non-Patent Citations (1)
Title |
---|
Experimental Evidence of Stability of Pt Clusters on and in Carbon Particles;Hitoshi SUZUKI et al.;《Japanese Journal of Applied》;20050422;第44卷(第19期);第610-612页 * |
Also Published As
Publication number | Publication date |
---|---|
CN112915997A (zh) | 2021-06-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109174085B (zh) | 原子级分散钯基纳米金刚石/石墨烯复合材料催化剂及其制备方法和应用 | |
CN107601458B (zh) | 一种单壁碳纳米管的制备方法 | |
JP5572642B2 (ja) | カーボンナノファイバ及び/またはカーボンナノチューブの製造方法 | |
Wang et al. | Non-precious molybdenum-based catalyst derived from biomass: CO-free hydrogen production from formic acid at low temperature | |
CN110148760B (zh) | 一种多孔碳-碳纳米管复合材料及其制备方法和应用 | |
WO2016140227A1 (ja) | カーボンナノチューブ被覆触媒粒子 | |
JPH0424320B2 (zh) | ||
CN112547057B (zh) | 一种电石法氯乙烯单体生产用的金催化剂及其制备方法 | |
CN111468116A (zh) | 一种褐煤焦负载纳米钴复合催化剂及其制备方法 | |
CN112938936A (zh) | 一种金属原子负载的纳米复合材料及其制备方法 | |
CN108514872B (zh) | 一种用于碳纳米管碱金属催化剂的制备方法 | |
Lin et al. | Preparation of a highly efficient carbon-supported ruthenium catalyst by carbon monoxide treatment | |
CN112915997B (zh) | 一种碳负载高分散贵金属催化剂的制备方法 | |
KR20080043161A (ko) | 액화천연가스의 수증기 개질반응에 의한 수소가스 제조용담지 촉매, 그 제조방법 및 상기 담지 촉매를 이용한수소가스 제조방법 | |
US2083824A (en) | Manufacture of hydrocyanic acid | |
JP5473306B2 (ja) | カーボンナノチューブ製造用触媒、それを用いたカーボンナノチューブの製造方法及び該触媒の製造方法 | |
Natewong et al. | Fibrous platelet carbon nanofibers-silica fiber composite supports for a Co-based catalyst in the steam reforming of acetic acid | |
Chen et al. | Production of hydrogen-rich gas and multi-walled carbon nanotubes from ethanol decomposition over molybdenum modified Ni/MgO catalysts | |
JP3628290B2 (ja) | 炭化水素の分解による接触的カーボンナノファイバーの製造方法及びその触媒 | |
WO2017193696A1 (zh) | 一种催化剂、其制备方法及其在合成气制备中的应用 | |
KR20230061724A (ko) | 메탄-함유 공급원료로부터 수소, 탄소 및 에틸렌을 제조하는 공정 | |
EP0133778B1 (en) | Methanol conversion process | |
CN110813369A (zh) | 一种富含单核锡氧四面体硅锡分子筛负载金属催化剂及其制备方法和应用 | |
CN112452318A (zh) | 一种水刻蚀石墨烯限域的Pt纳米复合材料及其制备方法和应用 | |
RU2394642C1 (ru) | Катализатор и способ дегидрирования углеводородов в его присутствии |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |