Galvanic反应原位制备多金属氢氧化物用于OER催化

In-situ preparation of multimetal hydroxide for OER catalysis by Galvanic reaction

采用镍氨和钴氨为电解液电沉积金属钴镍,提高材料的比表面积和导电性,再通过Galvanic反应快速合成了金属钴镍复合钴镍铁氢氧化物(CoNi/CoNiFe H)催化剂用于OER催化,采用XRD、SEM、XPS对材料的结构、形貌进行了表征,并研究了其电化学性能。结果表明:在1 M KOH溶液中,电流密度为10 mA·cm^(-2)时,过电位仅有250 mV,Tafel斜率为29 mV·dec^(-1),且具有良好的稳定性。这为制备廉价的多金属复合材料用于高效OER催化提供了新的方法。

Using nickel ammonia and cobalt ammonia as the electrolyte to electrodeposit metal cobalt and nickel to improve the specific surface area and conductivity of the material,and then quickly synthesize metal cobalt-nickel composite cobalt-nickel-iron hydroxide(CoNi/CoNiFe H)catalyst for OER catalysis through the Galvanic reaction.The structure and morphology of the material were characterized by XRD,SEM,and XPS,and its electrochemical performance was studied.The results show that when the current density is 10 mA·cm^(-2) in 1 M KOH solution,the overpotential of the metal composite polymetallic hydroxide is only 250 mV,the Tafel slope is 29 mV·dec^(-1),and it has good stability.It provides a new method for preparing cheap multi-metal composite materials for high-efficiency OER catalysis.