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| 1 | DFT-assisted rational design of CoM_(x)P/CC(M=Fe,Mn,and Ni) as efficient electrocatalyst for wide pH range hydrogen evolution and oxygen evolution显示文摘Rational design of highly active transition-metal phosphides for electrocatalyzing overall water splitting in a wide pH range assisted by first-principle calculations can efficiently save the developing cost and hence is quite attractive.Under the guidance of density-functional theory(DFT)calculations that the introduction of dopants(Fe,Mn,and Ni)into CoP could promote the hydrogen evolution reaction(HER)performances,a series of binder-free CoM_(x)P/carbon cloth(CC;M=Fe,Mn,and Ni;x=0,0.05,0.2,0.5,and 1)were fabricated.Both experimental measurements and DFT calculations confirm the electronic modulation of dopants.DFT calculations further reveal that the modulated electronic structure promotes the electronic conductivity,favors the adsorption of key species,and consequently promotes the electrochemical performances.As predicted,the bimetallic phosphides demonstrate excellent HER performances in alkaline,acidic,and alkaline simulated seawater solutions and also deliver excellent oxygen evolution reaction(OER)performances,overwhelming the commercial RuO_(2).Benefiting from the modulated electronic structure and the hierarchical structure with massive CoFe0.05P zero-dimensional(0D)quantum dots anchored on two-dimensional(2D)N-doped porous carbon,CoFe0.05P delivered the best HER in four kinds of electrolytes(ƞ10 of 73 mV in an alkaline simulated seawater solution)and OER in two kinds of electrolytes(ƞ10 of 264 mV in an alkaline solution)with excellent stability of 45 h in the alkaline solution.The assembled CoFe0.05P/CC//CoFe0.05P/CC with the electrodes folded by 180°can still maintain a low cell potential of 1.62 V at 10 mA·cm^(−2).This work proves the feasibility of the reported rational design strategy of developing efficient electrocatalysts for overall water splitting in a wide pH range. | Xiangrui Zhang Chunyan Sun Shusheng Xu Mengru Huang Yi Wen Xue-Rong Shi | 2022 | Nano Research2022，15，10： | 1 |
| 2 | 浅析尿素电解制氢及尿素燃料电池研究进展显示文摘尿素作为有效的氢载体,可应用于尿素电解(UE)制氢和直接尿素燃料电池(DUFC)。在尿素电解制氢中,阳极的尿素氧化反应(UOR)与阴极的析氢反应(HER)耦合生产氢气,与水电解制氢相比更具成本效益,能耗约降低30%,经济成本约降低36%。在直接尿素燃料电池中,尿素作为燃料在阳极进行氧化,与阴极的氧还原耦合将化学能转化为电能。UOR作为这2种能量转换技术的基础半反应,受到越来越多的关注。本文讨论了UOR在碱性电解质中的反应原理和性能描述参数,分别介绍了UOR在UE和DUFC中的应用,主要对UE和DUFC的作用原理和一些催化剂的发展现状进行了分析,最后探讨了UE和DUFC发展面临的挑战,希望本篇综述能对UE和DUFC的理解提供参考。 | 尹春 李家欣 冯立纲 | 2023 | 应用化学2023，40，8： | 0 |
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