The high demand for renewable energy storage and conversion has led to the exploration of highly efficient, low cost electrocatalysts for the oxygen evolution reaction (OER). Herein, CoAl layered double hydroxides (LDHs) hybridized with amorphous MoS_x nanosheets (CoAl-MoS_x-X, where X is the reduction reaction time) were synthesized in situ through a two-step procedure. Among these electrocatalysts, CoAl-MoS_x-12 exhibited the highest OER performance with an overpotential of 330 mV at 10 mA cm^-2 and a Tafel slope of 59 mV dec^-1 in alkaline solution. The underlying mechanism revealed that the density and the thickness of the MoS_x nanosheets on CoAl LDHs both play key roles in the enhanced OER activity by offering more exposed active sites and accelerated electron transfer. In addition, the in situ growth provides an intimate contact between MoS_x and the CoAl LDHs which is responsible for the relatively long-lasting stability of the electrocatalyst. This strategy adds to the methods available for the synthesis of LDH-supported materials as electrocatalysts with enhanced activity for renewable energy storage and conversion.

对可再生能源存储和转换的高需求已导致探索用于氧气析出反应（OER）的高效，低成本电催化剂。在此，通过两步程序原位合成了与无定形MoS _x纳米片（CoAl-MoS _x -X，其中X为还原反应时间）杂交的CoAl层状双氢氧化物（LDHs）。在这些电催化剂中，CoAl-MoS _x -12表现出最高的OER性能，在碱性溶液中在10 mA cm ^-2下的过电势为330 mV，在Tafel斜率下为59 mV dec ^-1。潜在的机理表明，MoS _x的密度和厚度CoAl LDH上的纳米片都通过提供更多的暴露活性位点和加速电子转移，在增强OER活性中发挥关键作用。另外，原位生长在MoS _x和CoAl LDH之间提供了紧密的接触，这导致了电催化剂的相对持久的稳定性。该策略增加了可用于合成LDH负载的材料作为电催化剂的方法，该材料具有增强的可再生能源存储和转化活性。