This study reports the synthesis of ultrafine NiFe‐layered double hydroxide (NiFe‐LDH) nanosheets, possessing a size range between 1.5 and 3.0 nm with a thickness of 0.6 nm. Abundant metal and oxygen vacancies impart the ultrafine nanosheets with semi‐metallic character, and thus superior charge transfer properties and electrochemical water oxidation performance with overpotentials (η) of 254 mV relative to monolayer LDH nanosheets (η of 280 mV) or bulk LDH materials (η of 320 mV) at 10 mA cm⁻². These results are highly encouraging for the future application of ultrafine monolayer LDH nanosheets in electronics, solar cells, and catalysis.

中文翻译：

---

用于电化学水氧化的亚3纳米超细单层分层双氢氧化物纳米片

这项研究报告了合成的超细NiFe层状双氢氧化物（NiFe-LDH）纳米片，其尺寸范围在1.5到3.0 nm之间，厚度为0.6 nm。相对于单层LDH纳米片（η为280 mV）或块状LDH材料，大量的金属和氧空位赋予超细纳米片具有半金属特性，因此具有优越的电荷转移性能和电化学水氧化性能，超电势（η）为254 mV。 10 mA cm ^-2时的n为320 mV 。这些结果对于超细单层LDH纳米片在电子，太阳能电池和催化领域的未来应用非常令人鼓舞。