Yao Qing, Huang Bolong, Zhang Nan, Sun Mingzi, Shao Qi, Huang Xiaoqing
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Ren'ai Road 199, 215123, Soochow, China.
Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
Angew Chem Int Ed Engl. 2019 Sep 23;58(39):13983-13988. doi: 10.1002/anie.201908092. Epub 2019 Aug 14.
Channel-rich RuCu snowflake-like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH-universal electrolytes. The optimized RuCu NSs/C-350 °C and RuCu NSs/C-250 °C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H SO and 0.05 m H SO , respectively, much lower than those of commercial Ir/C∥Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting.
由结晶态Ru和非晶态Cu组成的富含通道的RuCu雪花状纳米片（NSs）被用作在pH通用电解质中进行析氧反应（OER）、析氢反应（HER）和全水解的高效电催化剂。优化后的RuCu NSs/C-350 °C和RuCu NSs/C-250 °C分别表现出具有低过电位和小塔菲尔斜率的吸引人的OER和HER活性。当应用于全水解时，优化后的RuCu NSs/C在1 m KOH、0.1 m KOH、0.5 m H₂SO₄和0.05 m H₂SO₄中，在仅1.49、1.55、1.49和1.50 V的电池电压下可分别达到10 mA cm⁻²，远低于商业Ir/C∥Pt/C的电压。优化后的电解槽在1 m KOH中长达45 h后具有小的电位变化，表现出优异的耐久性，显示出一类用于全水解的高效功能性电催化剂。
