Interface Engineering-Inspired Electron Regulation in Pt/Pd Hetero-Metallene for Methanol-Assisted Hydrogen Evolution

Abstract

The small molecule oxidation reaction instead of oxygen evolution reaction coupled with hydrogen evolution reaction can greatly reduce the reaction overpotential of electrochemical water splitting, which is a very efficient and energy-saving hydrogen evolution strategy. Herein, we report an interface engineering constructed two-dimensional ultrathin curled Pt/Pd hetero-metallene for efficient electrocatalytic hydrogen evolution assisted by methanol. The thin-sheet structure of Pt/Pd hetero-metallene provides a large specific surface area and exposes numerous surface atoms that could act as reactive sites, thus accelerating the reaction mass transfer process. More importantly, the constructed Pt/Pd hetero-metallene possesses abundant Pt/Pd heterointerface, which can maximize the strong metal-metal interaction and increase the utilization of metal atoms, thereby optimizing the adsorption and activation of reactants during the reaction. Pt/Pd hetero-metallene can produce hydrogen stably and efficiently in 1 M KOH + 1 M CH3OH, and the voltage only needs 0.83 V at @100 mA cm-2 when used in electrocatalytic hydrogen evolution, which is much lower than the voltage required for the traditional electrochemical water splitting process (1.94 V). This work not only provides a powerful approach to rational design and construction of hetero-metallene through interface engineering, but also builds a bridge between hetero-metallene and methanol-assisted hydrogen evolution.

Supported nano-sized precious metal catalysts for oxidation of catalytic volatile organic compounds

“…The design of the reactor and the operating conditions can also influence the catalytic performance of the supported catalyst. [92][93][94] Optimizing parameters such as temperature, pressure, gas flow rate, and residence time can improve the conversion and selectivity of VOC oxidation.…”

Recent advances of H-intercalated Pd-based nanocatalysts for electrocatalytic reactions

“…[48][49][50][51] In recent years, modifying the electronic structure of Pd has paved another pathway for substantially enhancing their electrocatalytic performance. [52][53][54][55][56][57][58][59][60] Incorporating H atoms into Pd lattice can tailor the d-band center of Pd and accelerate the reaction kinetics by weakening the bond between the catalyst and reaction intermediate. 61,62 Kabiraz and coworkers have demonstrated that β-PdH cubes and octahedra could deliver enhanced catalytic activity and stability for MOR, due to the ligand effect originating from the interstitial alloying of β-PdH.…”

Electron Regulation of Heterostructured Pt/Rh Metallene Boosts Ethylene Glycol Electrooxidation and Hydrogen Evolution

“…In addition, the engineering of nanoparticles on a 2D structure is also an attractive strategy. Nanoparticle (NP)-deposited 2D nanomaterials can amplify the interface effect and improve atomic utilization. − More importantly, strong electron interaction at the heterostructure interface can promote the redistribution of electron charge density, adjust the adsorption of intermediates, and reduce the reaction energy barrier. − Therefore, the development of Pt/Rh heterostructured metallene is expected to be promising for H 2 production and the selective oxidation of ethylene glycol.…”