Electrocatalytic Performance of High‐Surface‐Area Platinum Catalysts Synthesized by Chemical Vapor Deposition for Water Splitting

Abstract

We present the deposition of Pt particles and films by chemical vapor deposition from platinum(II) acetylacetonate for electrochemical water splitting. High‐surface‐area particles can be obtained at substrate temperatures as low as 150 °C by this technique. Clear differences in morphology were identified, which depended on the type of reactive gas introduced in the process. Although oxygen leads to a crystalline film growth, hydrogen leads to an open structure of stacked Pt spheres. The electrochemically active surface area of these deposits were determined by hydrogen adsorption–desorption measurements in alkaline solution. With respect to water splitting and other catalytic processes, we present a way to synthesize and characterize high‐surface‐area Pt samples easily. To evaluate their electrocatalytic performance, the catalysts were analyzed in terms of the overvoltage for the hydrogen evolution reaction.

X-ray Photoelectron Spectroscopic Investigation of Plasma-Enhanced Chemical Vapor Deposited NiOx, NiOx(OH)y, and CoNiOx(OH)y: Influence of the Chemical Composition on the Catalytic Activity for the Oxygen Evolution Reaction

“…The catalyst films were prepared in our homemade/cold-wall CVD system, which is equipped with a heatable substrate holder, a pressure gauge, and three precursor sources. Gas flows are controlled by ABB gas-tube flowmeters . The precursor sources are separated from the chamber with plate valves .…”

“…Gas flows are controlled by ABB gas-tube flowmeters. 6 The precursor sources are separated from the chamber with plate valves. 5 The precursors were introduced into the reaction chamber using N 2 as the carrier gas.…”

Facile Dynamic Synthesis of Homodispersed Ni3S2 Nanosheets as a High‐Efficient Bifunctional Electrocatalyst for Water Splitting

“…Although with such great success, these previously reported Ni 3 S 2 ‐based catalysts by static hydrothermal method still need much overpotential for both HER and OER. Except for catalyst itself, a high and uniform dispersion of the active is also a significant factor in the high electrochemical performance of the supported catalysts . There may be some problems such as self‐assembly, agglomeration and discrete growth of crystals when the catalysts were fabricated by general hydrothermal method .…”

“…Except for catalyst itself, a high and uniform dispersion of the active is also a significant factor in the high electrochemical performance of the supported catalysts. [14] There may be some problems such as self-assembly, agglomeration and discrete growth of crystals when the catalysts were fabricated by general hydrothermal method. [15] This defect results in the low surface areas and few exposed active sites of the resultant catalysts and hinders electronic exchange.…”

Plasmonic hot-electron assisted phase transformation in 2D-MoS2 for the hydrogen evolution reaction: current status and future prospects

“…Although noble metals, such as platinum (Pt), show high catalytic activities towards the HER, the high cost and scarcity limit their widespread applications. 9 Two-dimensional (2D) transition metal dichalcogenides (TMDs) are a group of atomically thin semiconducting materials commonly represented as MX 2 , where M is a transition metal, e.g., Mo, W, and X is a chalcogen atom, e.g., S, Se, and Te. [10][11][12][13][14][15][16][17] For example, molybdenum disulde (MoS 2 ), molybdenum diselenide (MoSe 2 ), tungsten disulde (WS 2 ), and tungsten diselenide (WSe 2 ) are recently invented 2D-TMDs, which have created tremendous research interest in scientic communities for the HER.…”