Size control and electronic manipulation of Ru catalyst over B, N co-doped carbon network for high-performance hydrogen evolution reaction

Xu, Sheng; Niu, Mang; Zhao, Guowei; Ming, Shujun; Li, Xingyun; Zhu, Qi‐Long; Ding, Liang‐Xin; Kim, Minjun; Alothman, Asma A.; Mushab, Mohammed Sheikh Saleh; Yamauchi, Yusuke

doi:10.1007/s12274-022-5250-1

Cited by 88 publications

(47 citation statements)

References 44 publications

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“…In order to investigate the active role of nitrogen in the catalytic process and to determine the number of central elements that act as active components, N1s XPS analysis was performed on the D-GH catalyst. As shown in Figure 3 and Table S2 , there was a coexistence of pyridinic N, pyrrolic N, graphitic N, and oxidized N in the D-GH catalyst [ 7 , 25 ]. It was noteworthy from the detailed data of the nitrogen species content that pyridinic N showed a trend of increasing and then decreasing, while graphitic N and oxidized N gradually increased.…”

Section: Resultsmentioning

confidence: 99%

Deactivation and Regeneration of Nitrogen Doped Carbon Catalyst for Acetylene Hydrochlorination

Wang

Dai

2023

Molecules

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The poor stability of carbon materials doped with nitrogen limited their development in acetylene hydrochlorination. Therefore, investigating the deactivation reasons of carbon catalysts and researching regeneration methods became the research focus. Herein, carbon-nitrogen materials were synthesized by one-step pyrolysis, which using biomass materials with high nitrogen content, the synthesized material was used in an acetylene hydrochlorination reaction. The acetylene conversion rate of D-GH-800 catalyst was up to 99%, but the catalytic activity decreased by 30% after 60 h reaction. Thermogravimetric analysis results showed that the coke content was 5.87%, resulting in catalyst deactivation. Temperature-programmed desorption verified that the deactivation was due to the strong adsorption and difficult desorption of acetylene by the D-GH-800 catalyst, resulting in the accumulation of acetylene on the catalyst surface to form carbon polymers and leading to the pore blockage phenomenon. Furthermore, based on the catalyst deactivation by carbon accumulation, we proposed a new idea of regeneration by ZnCl2 activation to eliminate carbon deposition in the pores of the deactivated catalyst. As a result, the activity of D-GH-800 was recovered, and lifetime was also extended. Our strategy illustrated the mechanism of carbon deposition, and the recoverability of the catalyst has promising applications.

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Section: Resultsmentioning

confidence: 99%

Deactivation and Regeneration of Nitrogen Doped Carbon Catalyst for Acetylene Hydrochlorination

Wang

Dai

2023

Molecules

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“…The composite catalyst composed of HCA and boric acid had much higher catalytic activity than the single-component catalyst and did not require a complicated preparation process. However, previous studies on the structure of the complex formed by boric acid and HCA mostly analyzed the results in aqueous solutions [ 21 , 22 ]. Although these studies provided us with a useful reference, the solubility of HCA and boric acid in camphene and acetic acid is very low, and thus, we could not completely reproduce the research results in aqueous solutions.…”

Section: Discussionmentioning

confidence: 99%

“…The structures, reaction equilibria, reaction kinetics, and thermodynamics of the complexes formed by boric acid and AHAs have been previously reported [ 20 , 21 ]. B, N co-doped carbon surfaces and ultra-small Ru nanoparticles can transfer electrons from N atoms to Ru and from Ru to B atoms in reverse, which provides a moderate electronic modification of Ru, thus improving the catalytic activity [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Synthesizing Isobornyl Acetate/Isoborneol from Camphene Using α-Hydroxyl Carboxylic Acid Composite Catalyst

et al. 2023

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This study examined the preparation of isobornyl acetate/isoborneol from camphene using an α-hydroxyl carboxylic acid (HCA) composite catalyst. Through the study of the influencing factors, it was found that HCA and boric acid exhibited significant synergistic catalysis. Under optimal conditions, when tartaric acid–boric acid was used as the catalyst, the conversion of camphene and the gas chromatography (GC) content and selectivity of isobornyl acetate were 92.9%, 88.5%, and 95.3%, respectively. With the increase in the ratio of water to acetic acid, the GC content and selectivity of isobornol in the product increased, but the conversion of camphene decreased. The yield of isobornol was increased by adding ethyl acetate or titanium sulfate/zirconium sulfate to form a ternary composite catalyst. When a ternary complex of titanium sulfate, tartaric acid, and boric acid was used as the catalyst, the GC content of isobornol in the product reached 55.6%. Under solvent-free conditions, mandelic acid–boric acid could catalyze the hydration reaction of camphene, the GC content of isoborneol in the product reached 26.1%, and the selectivity of isoborneol was 55.9%. The HCA–boric acid composite catalyst can use aqueous acetic acid as a raw material, which is also beneficial for the reuse of the catalyst.

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“…27 Pyrolysis-obtained M−N−C catalysts, which feature atomically dispersed metal atoms on a carbon substrate, are an exemplary example of singleatom catalysts and have been flourishing in the past decade. 28 To this end, various precursors for pyrolysis have been explored; however, the development of pyrolysis-obtained M−N−C catalysts has stalled in recent years, with minimal progress in terms of electrocatalytic activity. This necessitates the precise construction of active sites in order to achieve a tailored structure and optimized performance.…”

Section: Historical Technical Route Disputementioning

confidence: 99%

Crafting Pyrolysis-Free M–N–C Catalysts

Chang-xin

Zhang

2023

Precision Chemistry

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M−N−C catalysts, with their transition metal atoms coordinated to nitrogen/carbon atoms as active sites, are gaining attention for their versatile heterogeneous electrocatalysis. Fabrication of these catalysts can be achieved through either bottom-up chemical synthesis or top-down pyrolysis procedures, where the former offers a well-defined structure and precise synthesis feasibility. This Perspective provides an overview of the history of the technical route dispute between pyrolysis and pyrolysis-free M−N−C catalysts, along with their respective advantages and disadvantages. Additionally, we emphasize the advantages of pyrolysis-free M−N−C catalysts, exemplified by several studies focused on precisely modulating the structure to regulate the activity, as well as the efforts of effectively integrating the active sites. Finally, we discuss the challenges and opportunities of pyrolysis-free M−N−C catalysts, with the aim of maximizing their inherent strengths of precise structure and promoting their industrial applications.

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Size control and electronic manipulation of Ru catalyst over B, N co-doped carbon network for high-performance hydrogen evolution reaction

Cited by 88 publications

References 44 publications

Deactivation and Regeneration of Nitrogen Doped Carbon Catalyst for Acetylene Hydrochlorination

Deactivation and Regeneration of Nitrogen Doped Carbon Catalyst for Acetylene Hydrochlorination

Study on Synthesizing Isobornyl Acetate/Isoborneol from Camphene Using α-Hydroxyl Carboxylic Acid Composite Catalyst

Crafting Pyrolysis-Free M–N–C Catalysts

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