通过高价镍物种调控提高高熵氢氧化物的析氧电催化性能
Boosting the oxygen evolution electrocatalysis of high-entropy hydroxides by high-valence nickel species regulation.
作者信息
Zhang Tao, Meng Yu-Lan, Zhao Yu-Hang, Ni Jing-Chang, Pan Yu, Dai Yan, Tan Zhenquan, Wang Xiao-Feng, Song Xue-Zhi
机构信息
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Panjin Campus, Panjin, 124221, China.
Institute of Functional Textiles and Advanced Materials, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-textiles, Qingdao University, Qingdao, 266071, China.
出版信息
Chem Commun (Camb). 2022 Jul 7;58(55):7682-7685. doi: 10.1039/d2cc02367a.
The addition of an extra metal source induces the transformation from crystalline α-Ni(OH) to an amorphous NiCoFeCrMo-based high-entropy hydroxide (HEH) and maximizes the high-valence Ni content in HEH. For OER electrocatalysis, the quinary HEH possesses an overpotential of 292 mV at 10 mA cm, a Tafel slope of 54.31 mV dec and the boosted intrinsic activity, surpassing other subsystems.
额外金属源的添加促使结晶态的α-Ni(OH)转变为非晶态的基于NiCoFeCrMo的高熵氢氧化物（HEH），并使HEH中的高价镍含量最大化。对于析氧反应（OER）电催化，这种五元HEH在10 mA cm时的过电位为292 mV，塔菲尔斜率为54.31 mV dec，且本征活性增强，超过了其他子体系。
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