Zeng Lingjian, Cao Binbin, Wang Xin, Liu Haidong, Shang Jingrui, Lang Jianping, Cao Xueqin, Gu Hongwei
College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Jiangsu, 215123, P. R. China.
Nanoscale. 2021 Feb 7;13(5):3153-3160. doi: 10.1039/d0nr08408e. Epub 2021 Feb 2.
Developing the highly efficient and low-cost electrocatalysts for the oxygen evolution reactions (OERs), as vital half reactions of water splitting, is crucial for renewable energy technology. The electrocatalysts based on multi-component and hierarchically structured non-noble metal hydr(oxy)oxide materials are of great prospects. Herein, we report an efficient strategy at low temperatures for synthesizing amorphous iron-doped cobalt-molybdenum ultrathin hydroxide (Fe-CoMo UH) nanosheets. Benefiting from the ultrathin amorphous structure and multi-metal coordination, Fe-CoMo UH nanosheets exhibit outstanding performance for OERs with a low overpotential of 245 mV at 10 mA cm, a small Tafel slope of 37 mV dec and an excellent stability for 90 h. The mass activity of Fe-CoMo UH is higher than that of commercial Ir/C and most of the transition metal hydroxide catalysts. This work provides a feasible consideration for the construction of promising efficient non-noble metal catalysts.
开发用于析氧反应（OER）的高效低成本电催化剂，作为水分解的关键半反应，对可再生能源技术至关重要。基于多组分和分级结构的非贵金属氢（氧）氧化物材料的电催化剂具有广阔前景。在此，我们报道了一种低温合成非晶态铁掺杂钴钼超薄氢氧化物（Fe-CoMo UH）纳米片的有效策略。受益于超薄非晶结构和多金属配位，Fe-CoMo UH纳米片在析氧反应中表现出优异性能，在10 mA cm时过电位低至245 mV，塔菲尔斜率小至37 mV dec，且具有90小时的优异稳定性。Fe-CoMo UH的质量活性高于商业Ir/C和大多数过渡金属氢氧化物催化剂。这项工作为构建有前景的高效非贵金属催化剂提供了可行的思路。
