In Situ Confining Pt Clusters in Ultrathin MnO₂ Nanosheets for Highly Efficient Hydrogen Evolution Reaction

Abstract

Rational synthesis of highly dispersed electrocatalyst with excellent electrocatalytic performance is critical for energy and environment applications. However, metal cluster with high surface free energy remains a challenge for the synthesis of stable and highly active catalysts. Herein, a highly dispersed platinum cluster anchored on the Mn vacancy of MnO2 nanosheets (PtAC‐MnO2) via in situ electrochemical methods is reported. The strongly binding energy between Pt clusters and supports can effectively suppress the migration of active Pt atoms and optimize their electronic structure for excellent electrocatalytic properties. Impressively, the PtAC‐MnO2 demonstrates a considerably low overpotential (η100) of 47 mV at 100 mA cm−2 and can be catalyzed continuously at 10 mA cm−2 for 80 h, showing better catalytic stability than the state‐of‐the‐art commercial Pt/C catalysts. A cationic vacancy defect strategy for the design and preparation of metal cluster catalysts is provided.

Photothermal-effect-promoted interfacial OH− filling and the conversion of carrier type in (Co1−xNix)3C during water oxidation

“…Hydrogen, as the cleanest energy carrier, is considered to be the most promising energy candidate. 1–23 Among the various hydrogen production methods, electrochemistry technologies have attracted great attention due to their fast and direct nature. However, their applicability on a large scale is often hampered by one of the half-reactions: the oxygen evolution reaction (OER) requires four electrons, which induces sluggish reaction kinetics.…”

Ethanol‐Induced Hydrogen Insertion in Ultrafine IrPdH Boosts pH‐Universal Hydrogen Evolution

“…substitution of fossil fuels due to the ultrahigh gravimetric energy density (142 MJ kg -1 ), rapid fuel make-up capability as well as non-polluting product. [1][2][3][4][5] Electrocatalytic water splitting via the hydrogen evolution reaction (HER) is a viable high-purity hydrogen generation technology with widely accessible reactants, competitive cost-effectiveness, and stable output that aroused intense research in contrast to the traditional natural gas decomposition and watergas conversion. [6][7][8][9][10] Platinum (Pt)-based materials are remaining utilized as the most desirable HER catalysts but are largely limited by the prohibitive costs and scarce reserves.…”

A single atom Ir doped heterophase of a NiMoP-NiMoPxOy ultrathin layer assembled on CNTs-graphene for high-performance water splitting

“…)-based electrocatalyst have been gradually investigated during recent decades, including structure, morphology engineering, and doping design. 6,7 These investigations have been dedicated to generating unique catalyst structures possessing specic physicochemical properties to effectively accelerate HER and OER kinetics. [8][9][10][11] Although metal oxides, hydroxides, and amorphous phases have shown promise as OER catalysts, metal phosphides, nitrides, suldes, and carbides are preferred for the HER.…”