Mesoporous Thin-Film NiS2 as an Idealized Pre-Electrocatalyst for a Hydrogen Evolution Reaction

ACS Catalysis ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 15114-15122
Author(s):  
Cüneyt Karakaya ◽  
Navid Solati ◽  
Umut Savacı ◽  
Emre Keleş ◽  
Servet Turan ◽  
...  
Keyword(s):  
Thin Film ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Mesoporous Thin Film

Aged Co-Mo alloy thin film catalyst for hydrogen evolution reaction in acidic solution

2021 ◽  
pp. 2151018
Author(s):  
Cihan Kuru
Keyword(s):  
Thin Film ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Acidic Solution ◽  
Alloy Film ◽  
Surface Oxide Layer ◽  
Alloy Thin Film ◽  
Acidic Solutions ◽  
Thin Film Catalyst

In this study, aged Co–Mo (3:10) alloy film has been demonstrated as an efficient and durable catalyst for hydrogen evolution reaction (HER) in acidic solution. The Co–Mo alloy films with varying Co/Mo atomic ratios have been deposited by magnetron sputtering. The catalytic activity of Mo film is outperformed by the Co–Mo alloys, among which the Co–Mo (3:10) alloy exhibits the highest HER activity with an overpotential of 310 mV at 10 mA cm[Formula: see text] current density, exchange current density of 1.74 × 10[Formula: see text] A cm[Formula: see text] and a Tafel slope of 61 mV dec[Formula: see text]. Combined with the good stability provided by the surface oxide layer, the aged Co–Mo (3:10) alloy is a promising catalyst for HER in acidic solutions.

A selectively exposed crystal facet-engineered TiO2 thin film photoanode for the higher performance of the photoelectrochemical water splitting reaction

2015 ◽  
Vol 8 (12) ◽  
pp. 3646-3653 ◽  
Author(s):  
Chang Woo Kim ◽  
So Jin Yeob ◽  
Hui-Ming Cheng ◽  
Young Soo Kang
Keyword(s):  
Thin Film ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Tio2 Thin Film ◽  
Photoelectrochemical Water Splitting ◽  
Crystal Facet

A selectively exposed (101)-crystal facet engineered TiO2 photoanode is investigated for the higher efficiency of the hydrogen evolution reaction.

Oxidative chemical vapour deposition of a graphene oxide carbocatalyst on 3D nickel foam as a collaborative electrocatalyst towards the hydrogen evolution reaction in acidic electrolyte

2018 ◽  
Vol 2 (6) ◽  
pp. 1305-1311 ◽  
Author(s):  
Sangchai Sarawutanukul ◽  
Nutthaphon Phattharasupakun ◽  
Juthaporn Wutthiprom ◽  
Montree Sawangphruk
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Hydrogen Evolution ◽  
Chemical Vapour Deposition ◽  
Hydrogen Evolution Reaction ◽  
Vapour Deposition ◽  
Nickel Foam ◽  
Chemical Vapour ◽  
Ni Foam ◽  
Acidic Electrolyte

In this study, a graphene oxide (GO) carbocatalyst was synthesized as a thin film on a 3D Ni foam substrate (GO@Ni) by oxidative chemical vapour deposition (CVD) using methanol and water as precursors.

Post-Process Modification of CeOx/C-Supported PtCu Thin Film Catalyst and Its Catalytic Activity for Hydrogen Evolution Reaction

NANO ◽  
2015 ◽  
Vol 10 (06) ◽  
pp. 1550082 ◽  
Author(s):  
Yumeng Zhao ◽  
Bin Yang ◽  
Xinyu Hao ◽  
Zhijing Zhao
Keyword(s):  
Thin Film ◽  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Photoelectron Spectroscopy ◽  
Ion Beam ◽  
Nanoporous Structure ◽  
Root Mean Square Roughness ◽  
Ion Beam Sputtering ◽  
Process Modification

CeO x/ C supported PtCu thin film catalysts were prepared by ion beam sputtering (IBS) and subsequently annealed at 400°C under vacuum environment and electrochemically dealloyed. Scanning transmission electronic microscope (STEM) and atomic force microscope (AFM) characterizations show that the surface of post-processed catalyst presents nanoporous structure and has a high root mean square roughness (RMS = 13.9nm). Electrochemical measurements indicate that the post-processed PtCu – CeO x/ C catalyst shows higher catalytic activity towards hydrogen evolution reaction than pure Pt / C . While inductively coupled plasma atomic emission spectroscopy (ICP-AES) analysis displays that the platinum ( Pt ) loading of the post-processed PtCu – CeO x/ C is 0.1192mg/cm2, decreasing by 20% compare to pure Pt / C (0.1490mg/cm2). X-ray photoelectron spectroscopy (XPS) analysis confirms that the surface of post-processed PtCu – CeO x/ C enrich Pt and analyzes the chemical valence of Pt element using depth profiling technology. It can be inferred that the enhancement in catalytic property is attributed to the combined action between geometric structure effect and electronic modification effect of Pt atoms from CeO x support.

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