Nano-Electro Mechanical Device Laboratory, School of Mechanical Engineering, and ‡Department of Chemical and Biomolecular Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
ACS Appl Mater Interfaces. 2017 Nov 1;9(43):37739-37749. doi: 10.1021/acsami.7b11192. Epub 2017 Oct 23.
The development of economical, proficient, and highly stable catalysts to substitute the expensive noble metal electrodes for electrocatalytic water-splitting applications is exceedingly desirable. In this context, the most fascinating and challenging approach is the rational design of a nanocomposite encompassing multiple components with unique functionalities. Herein, we describe the fabrication of a strongly catalytic and superb durable phosphorus-incorporated cobalt molybdenum sulfide electrocatalyst grown on carbon cloth (P-CoMoS/CC). The hybrid material exhibited excellent activity for hydrogen and oxygen evolution reactions over a wide range of pH (1-14) with extremely high stability (∼90% retention of the initial current density) after 24 h of electrolysis. Importantly, when P-CoMoS/CC was used as both cathode and anode for overall water splitting, a very low cell voltage of 1.54 V is required to attain the 10 mA cm current density, and the hybrid material exhibited a long-term stability (89.8% activity retention after 100 h). The outstanding overall water-splitting performance compared to an electrolyzer consisting of the noble-metal-based catalysts Pt/C and RuO makes P-CoMoS one of the most efficient earth-abundant water-splitting catalysts. Phosphorus incorporation was proved to be a vital aspect for the improved charge-transfer properties and catalytic durability of the P-CoMoS/CC catalyst.
开发经济、高效、高稳定的催化剂，以替代昂贵的贵金属电极用于电催化水分解应用，是非常可取的。在这方面，最吸引人且最具挑战性的方法是合理设计具有独特功能的多组分纳米复合材料。在此，我们描述了一种在碳纤维布（P-CoMoS/CC）上生长的具有强催化性和极好耐久性的磷掺杂钴钼硫化物电催化剂的制备。该混合材料在很宽的 pH 值范围内（1-14）对析氢和析氧反应表现出极好的活性，并且在 24 小时的电解后具有极高的稳定性（初始电流密度保留率约为 90%）。重要的是，当 P-CoMoS/CC 同时用作阴极和阳极进行全水分解时，仅需 1.54 V 的电池电压即可达到 10 mA cm 的电流密度，并且该混合材料具有长期稳定性（100 小时后活性保留率为 89.8%）。与由贵金属基催化剂 Pt/C 和 RuO 组成的电解槽相比，整体水分解性能优异，这使得 P-CoMoS 成为最有效的富含地球的水分解催化剂之一。磷的掺入被证明是提高 P-CoMoS/CC 催化剂电荷转移性能和催化耐久性的重要因素。
