Wu Weiming, Wu Xiao-Yuan, Wang Sa-Sa, Lu Can-Zhong
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
RSC Adv. 2018 Nov 26;8(69):39291-39295. doi: 10.1039/c8ra07195k. eCollection 2018 Nov 23.
Nanocrystalline transition metal phosphides (CoP and NiP) were successfully synthesized by a simple calcination method by using transition metal hydroxides and NaHPO as raw materials. Their catalytic activities for the hydrogen evolution from water electrolysis were evaluated with silicotungstic acid as an electron-coupled-proton buffer, whereby hydrogen and oxygen could be produced separately. It was found that the CoP sample showed higher catalytic activity (32 mmol min g) and good stability (12 h) as compared to the NiP sample, and its catalytic activity could rival that of the commercial Pt/C catalyst. The electrochemical results revealed that CoP had high cathodic current and small charge transfer resistance, which further suggested it was indeed an efficient noble metal-free catalyst for hydrogen evolution from water electrolysis.
通过使用过渡金属氢氧化物和磷酸二氢钠作为原料，采用简单的煅烧方法成功合成了纳米晶过渡金属磷化物（CoP和NiP）。以硅钨酸作为电子耦合质子缓冲剂，评估了它们对水电解析氢的催化活性，从而可以分别产生氢气和氧气。结果发现，与NiP样品相比，CoP样品表现出更高的催化活性（32 mmol min g）和良好的稳定性（12小时），其催化活性可与商业Pt/C催化剂相媲美。电化学结果表明，CoP具有高阴极电流和小电荷转移电阻，这进一步表明它确实是一种用于水电解析氢的高效无贵金属催化剂。
