当前位置: X-MOL 学术Adv. Energy Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Low Loading of RhxP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-08-13 , DOI: 10.1002/aenm.201801478
Qing Qin 1 , Haeseong Jang 2 , Lulu Chen 1 , Gyutae Nam 2 , Xien Liu 1 , Jaephil Cho 2
Affiliation  

Reducing the consumption of noble metals in energy devices, such as fuel cells, zinc–air batteries, and water splitting cells, is a core issue for achieving an environmentally sustainable society. Herein, two highly efficient electrocatalysts are synthesized, composed of N, P codoped carbon (NPC) modified with noble metals phosphides (RhxP/NPC and RuP/NPC) through pyrolysis of a mixture of RhCl3 · xH2O or RuCl3 · xH2O, respectively, with phytic acid. Unlike the reported rhodium and ruthenium phosphides, RhxP/NPC and RuP/NPC have a low loading of Rh (≈0.4 wt%) and Ru (≈0.5 wt%) and yet still exhibit excellent trifunctional activities for oxygen reduction, oxygen evolution, and hydrogen evolution reactions. For hydrogen evolution, RhxP/NPC shows a Pt‐like activity and excellent durability in acidic medium. Notably, RuP/NPC becomes more active after 2000 cycles in the durability test. For oxygen reduction, both of the catalysts show a half‐wave potential of 0.89 V, which is positively shifted 40 mV relative to that of Pt/C (0.85 V) in 0.1 m KOH. In addition, RhxP/NPC and RuP/NPC also exhibit activities superior to that of IrO2 in oxygen evolution. Finally, zinc–air batteries and water splitting cells assembled with RhxP/NPC and RuP/NPC catalysts display good performance.

中文翻译:

低氧的RhxP和RuP负载在N,P共掺杂碳上作为氧和氢电极反应的两种三官能电催化剂

减少能源设备(例如燃料电池,锌空气电池和水分解电池)中的贵金属消耗,是实现环境可持续社会的核心问题。在此,合成了两种高效的电催化剂,它们是由RhCl 3 · x H 2 O或RuCl的混合物热解后,由经贵金属磷化物(Rh x P / NPC和RuP / NPC)改性的N,P共掺杂碳(NPC)组成的3 · x H 2 O,分别与植酸。与报道的铑和钌的磷化物不同,Rh xP / NPC和RuP / NPC的Rh(≈0.4wt%)和Ru(≈0.5wt%)的负载量很低,但仍具有出色的三功能活性,可用于氧还原,氧释放和氢释放反应。对于析氢,Rh x P / NPC在酸性介质中表现出类似Pt的活性和出色的耐久性。值得注意的是,在耐久性测试中,RuP / NPC在2000次循环后变得更加活跃。为了减少氧气,两种催化剂均显示0.89 V的半波电势,相对于0.1 m KOH中的Pt / C(0.85 V)的电势,其正移40 mV 。此外,Rh x P / NPC和RuP / NPC在氧气析出方面也表现出优于IrO 2的活性。最后,将锌-空气电池和水分离电池与Rh x组装在一起P / NPC和RuP / NPC催化剂表现出良好的性能。
更新日期:2018-08-13
down
wechat
bug