Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, 100000, Hanoi, Vietnam.
University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, 100000, Hanoi, Vietnam.
Chem Asian J. 2018 Jun 18;13(12):1530-1534. doi: 10.1002/asia.201800401. Epub 2018 May 29.
Thin film of amorphous tungsten-doped cobalt oxide (W:CoO) was successfully grown on a conducting electrode via an electrochemical oxidation process employing a [Co(WS ) ] deposition bath. The W:CoO catalyst displays an attractive performance for the oxygen evolution reaction in an alkaline solution. In an NaOH solution of pH 13, W:CoO operates with a moderate onset overpotential of 230 mV and requires 320 mV overpotential to generate a catalytic current density of 10 mA cm . A low Tafel slope of 45 mV decade was determined, indicating a rapid O -evolving kinetics. The as-prepared W:CoO belongs to the best cobalt oxide-based catalysts ever reported for the oxygen evolution (OER) reaction.
通过电化学氧化过程在导电电极上成功生长了非晶态掺钨钴氧化物（W:CoO）薄膜，该过程使用 [Co(WS ) ] 沉积浴。W:CoO 催化剂在碱性溶液中对析氧反应表现出优异的性能。在 pH 值为 13 的 NaOH 溶液中，W:CoO 的起始过电势适中，为 230 mV，需要 320 mV 的过电势才能产生 10 mA·cm 的催化电流密度。确定了较低的 Tafel 斜率为 45 mV·decade，表明具有快速的 O 析出动力学。所制备的 W:CoO 属于迄今为止报道的用于析氧（OER）反应的最好的钴氧化物基催化剂之一。
