Recent Advances in Ultralow‐Pt‐Loading Electrocatalysts for the Efficient Hydrogen Evolution

Hydrogen production from water electrolysis provides a green and sustainable route. Platinum (Pt)‐based materials have been regarded as efficient electrocatalysts for the hydrogen evolution reaction (HER). However, the large‐scale commercialization of Pt‐based catalysts suffers from the high cost. Therefore, ultralow‐Pt‐loading electrocatalysts, which can reach the balance of low cost and high HER performance, have attracted much attention. In this review, representative promising synthetic strategies, including wet chemistry, annealing, electrochemistry, photochemistry, and atomic layer deposition are summarized. Further, the interaction between different electrocatalyst components (transition metals and their derivatives) and Pt is discussed. Notably, this interaction can effectively accelerate the kinetics of the HER, enhancing the catalytic activity. At last, current challenges and future perspectives are briefly discussed. Several synthesis strategies are reviewed for preparing ultralow‐Pt‐loading electrocatalysts in hydrogen evolution reaction (HER). Furthermore, the interaction between different catalyst components and Pt is discussed. The mechanisms of transition metals and their derivatives to accelerate the kinetics of HER and enhance the HER catalytic activity are summarized and future research directions are proposed.