构建低成本、高性能的非贵金属催化剂对促进燃料电池的发展具有重要意义。本研究通过静电纺丝技术和溶剂热反应法,在纳米纤维上负载Co(OH)_(2)纳米片,并以之为硬模板转化为ZIF-67纳米片,接着采用高温热处理法,获得氮掺杂碳纳米纤维(NCNF...构建低成本、高性能的非贵金属催化剂对促进燃料电池的发展具有重要意义。本研究通过静电纺丝技术和溶剂热反应法,在纳米纤维上负载Co(OH)_(2)纳米片,并以之为硬模板转化为ZIF-67纳米片,接着采用高温热处理法,获得氮掺杂碳纳米纤维(NCNF)负载Co-N-C纳米片(Co-NS)的非贵金属催化剂。基于高导电的NCNF、丰富的Co-N-C活性物种和纳米片阵列结构优势,NCNF/Co-NS催化剂具有极好的氧还原(ORR)动力学。测试结果表明,在0.1 mol/L KOH溶液中,NCNF/Co-NS催化剂的起始电位和半波电位分别为0.9 V vs.RHE和0.83 V vs.RHE,可与Pt/C(0.92 V vs.RHE,0.85 V vs.RHE)媲美,并表现出远高于Pt/C的电化学稳定性和耐甲醇性能,使其在能源领域具有广阔的应用前景。展开更多
Trimethoxybenzaldehyde (TMB) was hydrogenated over Pd/C in H 2-AcOH,in H 2-MeOH and in NH 2NH 2-PhMe system respectively.In Pd/C-TMB-H 2-AcOH system,TMB was reduced into 3,4,5-trimethoxytoluene (TMT) via 3,4,5-trimeth...Trimethoxybenzaldehyde (TMB) was hydrogenated over Pd/C in H 2-AcOH,in H 2-MeOH and in NH 2NH 2-PhMe system respectively.In Pd/C-TMB-H 2-AcOH system,TMB was reduced into 3,4,5-trimethoxytoluene (TMT) via 3,4,5-trimethoxybenzyl acetate and (1′-hydroxy)ethyl (3,4,5-trimethoxy)benzyl ether.In Pd/C-TMB-H 2-MeOH system,TMB was reduced into TMT via 3,4,5-trimethoxybenzyl alcohol,methyl(3,4,5-trimethoxy)benzyl ether and bis(3,4,5-trimethoxy)benzyl ether.In Pd/C-TMB-NH 2NH 2-PhMe system,TMB was reduced into TMT directly with mild manner and higher selectivity.展开更多
文摘构建低成本、高性能的非贵金属催化剂对促进燃料电池的发展具有重要意义。本研究通过静电纺丝技术和溶剂热反应法,在纳米纤维上负载Co(OH)_(2)纳米片,并以之为硬模板转化为ZIF-67纳米片,接着采用高温热处理法,获得氮掺杂碳纳米纤维(NCNF)负载Co-N-C纳米片(Co-NS)的非贵金属催化剂。基于高导电的NCNF、丰富的Co-N-C活性物种和纳米片阵列结构优势,NCNF/Co-NS催化剂具有极好的氧还原(ORR)动力学。测试结果表明,在0.1 mol/L KOH溶液中,NCNF/Co-NS催化剂的起始电位和半波电位分别为0.9 V vs.RHE和0.83 V vs.RHE,可与Pt/C(0.92 V vs.RHE,0.85 V vs.RHE)媲美,并表现出远高于Pt/C的电化学稳定性和耐甲醇性能,使其在能源领域具有广阔的应用前景。
文摘Trimethoxybenzaldehyde (TMB) was hydrogenated over Pd/C in H 2-AcOH,in H 2-MeOH and in NH 2NH 2-PhMe system respectively.In Pd/C-TMB-H 2-AcOH system,TMB was reduced into 3,4,5-trimethoxytoluene (TMT) via 3,4,5-trimethoxybenzyl acetate and (1′-hydroxy)ethyl (3,4,5-trimethoxy)benzyl ether.In Pd/C-TMB-H 2-MeOH system,TMB was reduced into TMT via 3,4,5-trimethoxybenzyl alcohol,methyl(3,4,5-trimethoxy)benzyl ether and bis(3,4,5-trimethoxy)benzyl ether.In Pd/C-TMB-NH 2NH 2-PhMe system,TMB was reduced into TMT directly with mild manner and higher selectivity.
