Dual Modification of Carbon Support Enables Robust Anchoring of Ruthenium Nanoclusters for Efficient Hydrogen Evolution and Aromatic Nitroreduction

The chemical challenge of economically splitting water into molecular hydrogen and oxygen requires continuous development of more efficient, less-toxic, and cheaper catalyst materials. This review article highlights the potential of iron sulfide-based nanomaterials as electrocatalysts for water-splitting and predominantly as catalysts for the hydrogen evolution reaction (HER). Besides new synthetic techniques leading to phase-pure iron sulfide nano objects and thin-films, the article reviews three new material classes: (a) FeS2-TiO2 hybrid structures; (b) iron sulfide-2D carbon support composites; and (c) metal-doped (e.g., cobalt and nickel) iron sulfide materials. In recent years, immense progress has been made in the development of these materials, which exhibit enormous potential as hydrogen evolution catalysts and may represent a genuine alternative to more traditional, noble metal-based catalysts. First developments in this comparably new research area are summarized in this article and discussed together with theoretical studies on hydrogen evolution reactions involving iron sulfide electrocatalysts.

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Nickel Electrocatalyst Promoted By Lace Oxide on Carbon Support for Hydrogen Evolution Reaction in Alkali Media

ECS Meeting Abstracts ◽

10.1149/ma2018-01/29/1704 ◽

2018 ◽

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Carbon Support

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Mulberry‐Inspired Nickel‐Niobium Phosphide on Plasma‐Defect‐Engineered Carbon Support for High‐Performance Hydrogen Evolution

Small ◽

10.1002/smll.202004843 ◽

2020 ◽

Vol 16 (43) ◽

pp. 2004843 ◽

Cited By ~ 1

Author(s):

Dongliang Chen ◽

Zhenmiao Xu ◽

Wei Chen ◽

Guangliang Chen ◽

Jun Huang ◽

...

Keyword(s):

Hydrogen Evolution ◽

High Performance ◽

Carbon Support

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Reversing the charge transfer between platinum and sulfur-doped carbon support for electrocatalytic hydrogen evolution

Nature Communications ◽

10.1038/s41467-019-12851-w ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 32

Author(s):

Qiang-Qiang Yan ◽

Dao-Xiong Wu ◽

Sheng-Qi Chu ◽

Zhi-Qin Chen ◽

Yue Lin ◽

...

Keyword(s):

Charge Transfer ◽

Hydrogen Evolution ◽

Carbon Support ◽

Catalytic Performance ◽

High Mass ◽

Carbon Supports ◽

Pt Nanoclusters ◽

Size Dependent ◽

Single Atoms ◽

Metal Support Interaction

Abstract Metal–support interaction is of great significance for catalysis as it can induce charge transfer between metal and support, tame electronic structure of supported metals, impact adsorption energy of reaction intermediates, and eventually change the catalytic performance. Here, we report the metal size-dependent charge transfer reversal, that is, electrons transfer from platinum single atoms to sulfur-doped carbons and the carbon supports conversely donate electrons to Pt when their size is expanded to ~1.5 nm cluster. The electron-enriched Pt nanoclusters are far more active than electron-deficient Pt single atoms for catalyzing hydrogen evolution reaction, exhibiting only 11 mV overpotential at 10 mA cm−2 and a high mass activity of 26.1 A mg−1 at 20 mV, which is 38 times greater than that of commercial Pt/C. Our work manifests that the manipulation of metal size-dependent charge transfer between metal and support opens new avenues for developing high-active catalysts.

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Distinctive MoS2-MoP nanosheets structure anchored on N-doped porous carbon support as a catalyst to enhance electrochemical hydrogen production

New Journal of Chemistry ◽

10.1039/d1nj02835a ◽

2021 ◽

Author(s):

Yaoxia Yang ◽

Xuqin An ◽

Mi Kang ◽

Fengyao Guo ◽

Lan Zhang ◽

...

Keyword(s):

Hydrogen Production ◽

Hydrogen Evolution ◽

Water Splitting ◽

Hydrogen Evolution Reaction ◽

Porous Carbon ◽

Low Cost ◽

Carbon Support ◽

Excellent Performance ◽

Electrochemical Water Splitting

The construction of excellent performance electrocatalysts for hydrogen evolution reaction (HER) with low-cost and economical strategy was still struggling with an enormous challenge in electrochemical water splitting. In this paper,...

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Structural similarity of ribosomes from E. coli and A. salina

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100082078 ◽

1978 ◽

Vol 36 (2) ◽

pp. 242-243

Author(s):

M. Boublik ◽

R.M. Wydro ◽

W. Hellmann ◽

F. Jenkins

Keyword(s):

Ribosomal Proteins ◽

Direct Evidence ◽

Structural Similarity ◽

Carbon Support ◽

Artemia Salina ◽

Uranyl Acetate ◽

Biological Assays ◽

E Coli ◽

And Function ◽

Fine Carbon

Ribosomes are ribonucleoprotein particles necessary for processing the genetic information of mRNA into proteins. Analogy in composition and function of ribosomes from diverse species, established by biochemical and biological assays, implies their structural similarity. Direct evidence obtained by electron microscopy seems to be of increasing relevance in understanding the structure of ribosomes and the mechanism of their role in protein synthesis.The extent of the structural homology between prokaryotic and eukaryotic ribosomes has been studied on ribosomes of Escherichia coli (E.c.) and Artemia salina (A.s.). Despite the established differences in size and in the amount and proportion of ribosomal proteins and RNAs both types of ribosomes show an overall similarity. The monosomes (stained with 0.5% aqueous uranyl acetate and deposited on a fine carbon support) appear in the electron micrographs as round particles with a diameter of approximately 225Å for the 70S E.c. (Fig. 1) and 260Å for the 80S A.s. monosome (Fig. 2).

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Radiation Damage of Support Films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100096862 ◽

1981 ◽

Vol 39 ◽

pp. 28-29

Author(s):

H.A. Cohen ◽

W. Chiu

Keyword(s):

Transfer Function ◽

Low Temperatures ◽

Carbon Support ◽

Contrast Transfer Function ◽

Electron Dose ◽

Imaging Parameters ◽

Negative Stain ◽

Phase Corrections ◽

Two Parameters ◽

Medium Dose

The goal of imaging the finest detail possible in biological specimens leads to contradictory requirements for the choice of an electron dose. The dose should be as low as possible to minimize object damage, yet as high as possible to optimize image statistics. For specimens that are protected by low temperatures or for which the low resolution associated with negative stain is acceptable, the first condition may be partially relaxed, allowing the use of (for example) 6 to 10 e/Å2. However, this medium dose is marginal for obtaining the contrast transfer function (CTF) of the microscope, which is necessary to allow phase corrections to the image. We have explored two parameters that affect the CTF under medium dose conditions.Figure 1 displays the CTF for carbon (C, row 1) and triafol plus carbon (T+C, row 2). For any column, the images to which the CTF correspond were from a carbon covered hole (C) and the adjacent triafol plus carbon support film (T+C), both recorded on the same micrograph; therefore the imaging parameters of defocus, illumination angle, and electron statistics were identical.

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