Atomically dispersed ruthenium in carbon aerogels as effective catalysts for pH-universal hydrogen evolution reaction

He, Ting; Song, Yaya; Yang, Chen; Song, Xianwen; Lu, Bingzhang; Liu, Qiming; Liu, Hongtao; Zhang, Yi; Ouyang, Xiaoping; Chen, Shaowei

doi:10.1016/j.cej.2022.136337

Cited by 33 publications

(15 citation statements)

References 66 publications

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“…For example, using a biomass hydrogel (gelatin) as a precursor and structural template, Zhang and co‐workers prepared carbon aerogels embedded with RuN x atomic sites and Ru nanoclusters in 2022 by controllable pyrolysis strategy. [ 38 ] By adjusting the initial feeding ratio of hydrogel precursor and metal salt, the proportion of atomically dispersed Ru in the nanocomposite was as high as 86%. In 2023, using a two‐step pyrolysis approach of biomass hydrogel, they further prepared FeN 4 SACs loaded on carbon aerogel with adjacent Fe nanoclusters (the Fe nanoclusters increased the 3d electron density and reduced magnetic moment of the central Fe SACs, significantly enhancing the reactivity and antioxidant stability of FeN 4 sites).…”

Section: The Synthetic Breakthrough Of Atomic Aerogel Materialsmentioning

confidence: 99%

Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science

2023

Advanced Materials

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metal catalyst not only has a relatively low metal loading but also greatly improves the utilization efficiency of metal atoms. It can change the adsorption/desorption selectivity of the active components on the catalyst to different molecules, thus affecting the reaction kinetics. [4][5][6] With the development of advanced characterization technologies (synchrotron-radiation X-ray absorption fine structure (XAFS), including X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS); special aberration-corrected transmission electron microscopy (AC-TEM), such as high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), etc.), it has become a reality to elucidate the structure-activity relationship of SACs at the angstroms atomic scale, which also provides an opportunity to link heterogeneous catalysis with homogeneous catalysis. [7,8] In particular, SACs provide a perfect operational platform for the study of molecular level catalytic reaction mechanism. The applications of SACs also become more and more wide, including the versatile heterogeneous catalytic fields (thermocatalysis, electrocatalysis, and photocatalysis) or noncatalytic fields (energy storage battery, electromagnetic wave absorption, and so on).Aerogel is a form of solid matter, one of the least dense solids in the world. The most common aerogel is made of silica; but there are also aerogels made of graphene, metal oxides, polymers, and so on. [9] The lightest silica aerogel is only 3 mg cm −3 , which is 3 times heavier than air, so it is also called "frozen smoke" or "solid smoke." Traditional aerogel material refers to a kind of porous solid material of nanometer or micrometer level formed by the sol-gel method, using certain drying methods (such as freeze drying) to make gas replace liquid phase in gel. [10] Aerogels are highly porous materials (more than 90% porosity), whose internal structure is formed by a network of interconnected basic units (nanosheets, nanofibers, or nanoparticles) separated by open pores. The combination of small basic units, high surface area, and open structure makes aerogels have many unique properties in thermal, mechanical, optical, electrical, and acoustic aspects, which can be used as excellent adsorbents, catalysts, heat insulation materials, and soundThe concept of "single-atom catalysis" is first proposed by Tao Zhang, Jun Li, and Jingyue Liu in 2011. Single-atom catalysts (SACs) have a very high catalytic activity and greatly improved atom utilization ratio. At present, SACs have become frontier materials in the field of catalysis. Aerogels are highly porous materials with extremely low density and extremely high porosity. These pores play a key role in determining their surface reactivity and mechanical stability. The alliance of SACs and aerogels can fully reflect their structural advantages and lead to new enhancement effects. Herein, a general concept of "atomic aerogel materials" (AAMs) (or single-atom aerogels (SAAs)) is proposed to descr...

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Section: The Synthetic Breakthrough Of Atomic Aerogel Materialsmentioning

confidence: 99%

Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science

2023

Advanced Materials

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“…The stability of single-atom catalysts (SACs) is a great challenge for large-scale practical applications due to their highly unsaturated coordination environment. Zhang et al [ 84 ] prepared atomically isolated ruthenium-doped CAs by biomass hydrogel pyrolysis, which exhibited remarkable performance over a wide range of solution pH due to the formation of abundant RuNx moieties. The best sample (NCAG/Ru-3) has ultralow overpotentials at a current density of 10 mA cm −2 , 65 mV in 0.5 M H 2 SO 4 , 45 mV in 1.0 M phosphate buffer, and 4 mV in −1.0 M KOH, with mass activities 6, 16, and 44 times that of commercial Pt/C, respectively.…”

Section: Applications Of Cas In Electrocatalysismentioning

confidence: 99%

Carbon Aerogels as Electrocatalysts for Sustainable Energy Applications: Recent Developments and Prospects

Zhang

Xuan

et al. 2022

Nanomaterials

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Carbon aerogel (CA) based materials have multiple advantages, including high porosity, tunable molecular structures, and environmental compatibility. Increasing interest, which has focused on CAs as electrocatalysts for sustainable applications including oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and CO2 reduction reaction (CO2RR) has recently been raised. However, a systematic review covering the most recent progress to boost CA-based electrocatalysts for ORR/OER/HER/CO2RR is now absent. To eliminate the gap, this critical review provides a timely and comprehensive summarization of the applications, synthesis methods, and principles. Furthermore, prospects for emerging synthesis, screening, and construction methods are outlined.

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“…Noble metal commercial Pt/ C and RuO 2 are considered as highly efficient ORR, HER, and OER electrocatalysts, respectively. [8][9][10] Although they have high activity, their inherent disadvantages, such as high cost, scarce reserves, and poor tolerance, are difficult to overcome and seriously limit their large-scale commercial application. [11][12][13] It is difficult for a single noble metal electrocatalyst to achieve ORR/OER or OER/HER in the same medium, or even the multifunctional electrocatalytic activity of ORR/OER/HER, which does not meet the requirements needed for environmental protection equipment technology.…”

Section: Introductionmentioning

confidence: 99%

Dicyandiamide-assisted synthesis of N-doped porous CoMn–Nx@N–C carbon nanotube compositesviaMOFs as efficient trifunctional electrocatalysts in the same electrolyte

Feng

Xie

et al. 2023

Nanoscale

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Atomically dispersed ruthenium in carbon aerogels as effective catalysts for pH-universal hydrogen evolution reaction

Cited by 33 publications

References 66 publications

Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science

Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science

Carbon Aerogels as Electrocatalysts for Sustainable Energy Applications: Recent Developments and Prospects

Dicyandiamide-assisted synthesis of N-doped porous CoMn–Nx@N–C carbon nanotube compositesviaMOFs as efficient trifunctional electrocatalysts in the same electrolyte

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