DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 28
·9714-9720
·
IF 4
Sirui Liu,Yuxin Shi,Lingling Xu,Weican Zhan,Meixi Chen,Xiaoyue Pan,Yuqing Yao,Jiajie Cai,Mingyi Zhang,Xinzhi Ma
Designing an excellent OER catalyst in an alkaline environment is severe yet essential for industrial H2 application under the electrochemical technique. This study has achieved multiple modifications on CoN nanowires, the classic OER catalyst, via a facile room-temperature NaBH4 spontaneous hydrolysis. This facile process simultaneously generates oxygen vacancies and robust BN species. It wraps hydrophilic BOx motifs on the OER response CoN nanowires, producing OER active Co–N–B species, increasing active numbers and guaranteeing structural stability. It suggests that a low NaBH4 concentration (0.1 mol L−1) treatment endows CoNNWAs/CC with excellent OER performance and robust structure, which can drive a current density of 50 mA cm−2 with only 325 mV overpotentials with more than 24 hours’ durability. Even, the catalyst can drive 1000 mA cm−2 around 480 mV overpotential. This study allows a novel strategy for designing high-performance OER catalysts.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
M.O. Abdel-Salam,Youngsoo Kim,Yasser M. Moustafa,Taeho Yoon
Green hydrogen is a crucial element in the hydrogen value chain, encompassing hydrogen production, transportation, storage, and application. The production of green hydrogen via NaBH 4 hydrolysis (SBH) entails a high cost. However, the fast kinetics of this process with a catalyst compensate for the substantial cost, especially in specific applications, such as local or intermittent use. Silver is known for its excellent catalytic properties. Its high catalytic activity is a key factor in achieving efficient hydrogen generation from (SBH). In this study, a nanocomposite catalyst composed of silver nanoparticles (AgNPs), CoFe 2 O 4 , and carbon nanotubes (CNT) was investigated to demonstrate an effective catalyst design approach to achieve enhanced hydrogen generation performance. The H 2 production rate in the presence of Ag-based/CoFe 2 O 4 –CNT was 320 mL min −1 g −1 , and the apparent activation energy was 14.7 kJ mol −1 , superior to that of Ag-based catalysts reported in the literature. Analyses of the observed outcomes revealed that the CNT was decorated with well-dispersed AgNPs and CoFe 2 O 4 nanoparticles. The synergistic effects of AgNPs, CoFe 2 O 4 , and CNT were demonstrated by analyzing the kinetic behaviour of each component based on systematic comparisons. Furthermore, the paramagnetic property of CoFe 2 O 4 enables harvesting of the catalyst using an external magnetic field, and it was verified that the reactivity of the collected catalyst was maintained throughout seven successive cycles. The outstanding catalytic performance of Ag/CoFe 2 O 4 – CNT should be attributed to the uniform dispersion of nanoparticles on the CNT surface. Furthermore, our key approach for developing efficient Ag-based carbon advanced catalysts for SBH in the future is to ensure their suitability for industrial applications.
研究领域:
材料科学
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催化化学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Xiaoqing Cao,Jun Zhou,Zhipeng Zhai,Song Li,Guo Yuan,Gaowu Qin
Development of efficient and sustainable monolithic catalysts for NaBH4 hydrolysis remains an important goal for hydrogen cycling. In this work, the structured catalyst Ru/MgO with an on–off feature has been prepared by directly growing a nano-Ru-embedded MgO coating layer on a Mg substrate via an instant high-temperature plasma oxidation process. The porous MgO framework provides an ideal space for the access of reactants and diffusion of mass transport, which facilitates reaction triggering and the expulsion of byproducts to avoid poisoning the catalyst. Importantly, Ru nanoparticles (NPs) are monodisperse with ultrasmall particle size deriving from a concurrent rapid arcing and fast quenching. The hierarchical structured Ru NP catalysts are highly active for hydrolysis of sodium borohydride by achieving a high hydrogen generation rate (HGR) of 101,189 mL min–1 g–1 and exhibit attractive stability. In addition, it is facile to realize the “on–off” functionality based on simple separation that could accurately control the hydrogen generation, suggesting the structured catalyst to be of great potential for practical applications. This simple method opens valuable opportunities for fast synthesis of the high-quality structured catalyst and could be extended to various noble metals on oxides of valve metals with high catalytic performance.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Jinlin Song,Ran Li,Hua Dong
Numerous catalysts have been widely investigated for accelerating hydrogen production from NaBH 4 hydrolysis. However, these catalysts are usually complicated in structures, costly in fabrication, and hazardous for environment. In this work, cheap and environment-friendly acetic acid, CH 3 COOH, is employed to promote NaBH 4 hydrolysis to produce hydrogen in a considerable rate. The experimental results demonstrate that the addition of suitable amount of CH 3 COOH into NaBH 4 solutions stabilized with NaOH could dramatically accelerate the hydrolysis reaction . Additionally, the start/stop of NaBH 4 hydrolysis could be controlled by adding acid or base into the solution to realize “go-as-you-please” on-site hydrogen production.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huatong Li,Xinran Hu,Lixia Wang,Luyan Shi,Tayirjan Taylor Isimjan,Xiulin Yang
Developing heterostructured catalysts with highly active and reusable is an urgent task to achieve green hydrogen production via NaBH 4 . Herein, we proposed a novel NaCl template method, which involves solid-state physical grinding of metal salts, reducing agents and prepared carbon spheres with the participation of sodium chloride to synthesize Ru-particles decorated CoB 2 O 4 supported on hollow mesoporous carbon nanospheres (Ru/CoB 2 O 4 @C) catalysts for efficient and durable H 2 generation through alkaline hydrolysis of NaBH 4 . The optimized catalyst with a Ru content of 3.0 wt% exhibits a high hydrogen generation rate of 8139 mL min −1 g cat - 1 and a low activation energy of 33.2 kJ mol −1 for NaBH 4 hydrolysis, which is one of the most efficient catalysts reported recently. The extraordinary performance is mainly attributed to the synergistic effect between Ru and CoB 2 O 4 species and abundant oxygen vacancies, which facilitate charge redistribution and provide more active sites, thereby enhancing the catalytic activity. Density functional theory calculations support the proposed Michaelis-Menten mechanism, where BH 4 − and H 2 O are adsorbed on electron-rich Ru and electron-deficient CoB 2 O 4 surfaces, respectively, and the reaction energy barrier for the rupture of the B-H bond as the rate-determining step is only 1.37 eV, synergistically promoting the hydrolysis of NaBH 4 . Our study provides an innovative method for designing efficient and stable catalysts for green hydrogen generation.
研究领域:
材料科学
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催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jian Ji,Kebin Deng,Jianing Li,Zhihua Zhang,Xuezhi Duan,Haibao Huang
Despite substantial progress in various application fields of polyoxometalates (POMs), the use of POMs as ligands to alter the structure of solid catalysts in heterogeneous catalysis requires additional efforts. Herein, we used the reduced α-SiW 12 O 40 4- (RSTA) as an inorganic ligand to mediate Co 3 O 4 nanoparticles that efficiently promote the hydrolysis of NaBH 4 to generate hydrogen with multiple activities (4747 mL/(g cat ·min)) compared with NaBH 4 -pretreated Co 3 O 4 (1236 mL/(g cat ·min)), pristine Co 3 O 4 (inactive) and commercial Co 3 O 4 (inactive) at 25℃. RSTA induced both electronic and morphology effects on Co 3 O 4 through in situ driving 3D Co 3 O 4 nanoparticles to 2D Co 3 O 4 nanosheets with rich surface oxygen vacancies or Co 2+ during the hydrolysis process. This modulation by RSTA allowed more active sites, including both electron-rich Co 0 and electron-deficient Co 2+ , facilitating BH 4 - and H 2 O adsorption and thus hydrogen generation. The promoted mechanism of the RSTA on both the microstructure and the catalytic performance was further proposed.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Lisi Xie,Kunyang Wang,Gu Du,Abdullah M. Asiri,Xuping Sun
In this work, we demonstrate the first use of cobalt oxide nanosheet array on carbon cloth (CoO/CC) as an efficient catalyst for the dehydrogenation of NaBH 4 . This catalyst shows a low activation energy of 35.40 kJ/mol for NaBH 4 hydrolysis and the hydrogen generation rate at 30 °C can reach up to 5955.29 mL/min/g CoO . Moreover, the catalyst exhibits high recyclability and durability. It suggests that the hydrolysis kinetics depends on many parameters, including temperature, NaBH 4 concentration, NaOH concentration and mass of catalyst.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Kai Li,Min Ma,Lisi Xie,Yadong Yao,Rongmei Kong,Gu Du,Abdullah M. Asiri,Xuping Sun
In this work, we demonstrate the first use of NiCoP nanosheet array on Ti mesh (NiCoP NA/Ti) as an efficient catalyst for hydrolysis of NaBH 4 in alkaline media . This catalyst shows a low activation energy of 52.68 kJ/mol for NaBH 4 hydrolysis meanwhile the hydrogen generation rate can achieve 3016.79 mL/min/g (NiCoP) at 303 K, outperforming most reported Co-based noble-metal-free catalysts and some noble-metal catalysts. Remarkably, the catalyst exhibits high recyclability , durability and controllability for on-demand hydrogen generation in alkaline NaBH 4.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Jiale Shen,Danyun Xu,Jian Ji,Qicheng Zhang,Xiaobin Fan
Sodium borohydride (NaBH 4 ) has been proposed to be a realizable hydrogen supplier for proton-exchange membrane fuel cell. Cobalt boride (CoB) is one of the most promising non-precious metal-based catalysts toward NaBH 4 hydrolysis. In this work, we develop a facile method to synthesize defects-rich TiO 2 supported CoB nanoparticles (CoB/TiO 2- x ). In this CoB/TiO 2- x , an electronic metal-support interaction is induced by transferring electrons from the defective TiO 2 to CoB to form electron-rich CoB particles, facilitating the hydrolysis of NaBH 4 . The as-synthesized CoB/TiO 2- x catalyst shows a good catalytic performance with hydrogen generation rate of 3070 mL min −1 g Co −1 and activation energy of 57.03 kJ mol −1 .
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2021
·
IF 3.626
Qiaoqi Li,Fei Wang,Xin Zhou,Jianmei Chen,Chao Tang,Lili Zhang
Herein, we reported the systematic investigation of synergistic photo-thermal-catalysis for NaBH 4 hydrolysis reaction based on zinc orthogermanate. A series of Zn 2 GeO 4 : x Fe 3+ ( x = 0 to 0.10) catalysts were prepared via solvothermal method. The H 2 evolution experiments demonstrated that the photogenerated holes trap OH − not only shifted the equilibrium of NaBH 4 hydrolysis reaction toward the direction of H 2 evolution, but also inhibited the recombination of photogenerated carriers. With the remarkable photo-thermal synergism for the as-prepared catalysts, the H 2 evolution rate in photo-thermal-driven condition had witnessed several times higher than that in mono-energy driven condition. The catalysts remained stable after circulation tests.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 46
·25873-25880
·
IF 2.936
Jie Guo,Yongjiang Hou,Bo Li
A hollow Ni–Fe–B nanochain is successfully synthesized by a galvanic replacement method using a Fe–B nanocomposite and a NiCl2 solution as the template and additional reagent, respectively. Both the concentration of Ni and the morphology of the resulting Ni–Fe–B alloy are controlled by varying the duration of the replacement process during the synthesis. The Ni–Fe–B sample synthesized for 60 min (Ni–Fe–B-60) shows the best catalytic activity at 313 K, with a hydrogen production rate of 4320 mL min−1 gcat−1 and an activation energy for the NaBH4 hydrolysis reaction of 33.7 kJ mol−1. The good performance of Ni–Fe–B-60 towards the hydrolysis of NaBH4 can be ascribed to both hollow nanochain structural and electronic effects. Furthermore, the effects of temperature, catalyst amount, and concentration of NaOH and NaBH4 on the hydrolysis process are systematically studied, and an overall kinetic rate equation is obtained. The hollow Ni–Fe–B nanochain catalyst also shows good reusability characteristics and maintained its initial activity after 5 consecutive cycles.
研究领域:
材料科学
·
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yuxin Li,Guolang Zhou,Jingzhou Yin,Feixiang Li,Qing Zou,Wen Chen,Wenjie Yan,Qiaoqi Li,Cheng Liu,Alireza Khataee,Lili Zhang
Two-dimensional catalysts, which are sensitive to visible light and have a photothermal effect, can be used to catalyse the release of H 2 from sodium borohydride (NaBH 4 ) are being actively explored in energy saving systems. In this work, oxygen vacancy enriched two-dimensional CoFe-layered double hydroxide (CoFe-LDH) derivatives (named as CoFe- x °C, x = 200–500) have been explored for NaBH 4 hydrolysis catalyzed by photo-thermal synergy without external heat source. The CoFe-300 °C presents its initial hexagonal lamellar structure and has the highest concentration of oxygen vacancy . These unique properties guarantee its excellent photo-thermal synergistic catalytic performance, achieving hydrogen production rate of 1877.5 mmol g −1 h −1 , and maintains high efficiency after 5 cycles. This enhanced photo-thermal synergistic catalytic mechanism is the •OH (generated from h + and H 2 O) attacks BH 4 − (absorbed on O v sites) to produce H 2 , the heat from photothermal conversion accelerates the adsorption ability and attacking rate. This study opens a new strategy for the synergistic photo-thermal catalytic hydrolysis of NaBH 4 .
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）