The oxygen evolution reaction is the bottleneck to energy-efficient water-based electrolysis for the production of hydrogen and other solar fuels. In proton exchange membrane water electrolysis (PEMWE), precious metals have generally been necessary for the stable catalysis of this reaction. In this work, we report that delamination of cobalt tungstate enables high activity and durability through the stabilization of oxide and water-hydroxide networks of the lattice defects in acid. The resulting catalysts achieve lower overpotentials, a current density of 1.8 amperes per square centimeter at 2 volts, and stable operation up to 1 ampere per square centimeter in a PEMWE system at industrial conditions (80°C) at 1.77 volts; a threefold improvement in activity; and stable operation at 1 ampere per square centimeter over the course of 600 hours.

中文翻译：

---

钨酸钴捕获水-氢氧化物用于质子交换膜水电解


析氧反应是用于生产氢气和其他太阳能燃料的节能水基电解的瓶颈。在质子交换膜水电解（PEMWE）中，贵金属通常是该反应稳定催化所必需的。在这项工作中，我们报告说，钨酸钴的分层通过稳定酸中晶格缺陷的氧化物和水-氢氧化物网络来实现高活性和耐久性。由此产生的催化剂实现了较低的过电势，在2伏电压下电流密度为1.8安培/平方厘米，并且在工业条件（80°C）、1.77伏电压下在PEMWE系统中稳定运行高达1安培/平方厘米；活动能力提高三倍；并在每平方厘米1安培的电流下稳定运行600小时。