Effect of MWCNTs and lithium modified MWCNTs on electrochemical hydrogen storage properties of Co0.9Cu0.1Si alloy

Zhao, Jianxun; Zhai, Xiaojie; Xing, Tao; Liu, Heng; Liu, Wanqiang; Jiang, Dayong; Gao, Shang

doi:10.1016/j.ijhydene.2018.05.109

Cited by 31 publications

(13 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Co 0.9 Cu 0.1 Si alloys coated with lithium modified MWCNTs have also been prepared. The additives can enhance the electrocatalytic activity of the alloy and are favorable for the hydrogen transfer 31 …”

Section: Introductionmentioning

confidence: 99%

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Liu

Chen

et al. 2020

Int J Energy Res

Self Cite

View full text Add to dashboard Cite

A facile one-pot reduction process is used to obtain the cobalt/graphene composite (CoRGO). The CoRGO materials exhibit unique reticular globular morphology. Co 9 S 8 hydrogen storage alloy is fabricated via mechanical alloying method. Different amounts of CoRGO are coated on the surface of Co 9 S 8 alloy by ball milling. The electrochemical characterizations of the composites are conducted in the standard tri-electrode system. Ultimately, the CoRGO coated Co 9 S 8 electrode shows preferable performance than the RGO modified alloy (603.6 mAh/g) and original alloy (577.3 mAh/g). As the additive content of CoRGO is 6 wt%, a maximum discharge capacity of 637.5 mAh/g is obtained. Furthermore, the cycle stability and high-rate dischargeability of the electrode are also enhanced. The Co particles in the CoRGO participate in the reversible redox reactions and the graphene provides high conductivity. The CoRGO with distinctive structure and morphology can not only improve the electrocatalytic activity but also increase the specific surface area of Co 9 S 8 alloy. The cobalt and graphene species in the CoRGO composite serve a synergistic effect in further facilitating the hydrogen diffusion, expediting the charge transfer in/on the alloy and improving the corrosion resistance, thus enhancing the electrochemical performance and reaction kinetics of Co 9 S 8 alloy.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Liu

Chen

et al. 2020

Int J Energy Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…The production of H 2 is the primary problem of hydrogen utilization 1‐5 . The hydrogen‐energy process chain is consisted by the hydrogen production 6 , hydrogen storage 7‐10 and regeneration 11‐13 . Nowadays, the wide usages of H 2 energy are still seriously prevented by the H 2 production and H 2 storage issues 9,14,15 .…”

Section: Introductionmentioning

confidence: 99%

“…by the H 2 production and H 2 storage issues. 9,14,15 Appropriate methods for H 2 generation and storage should be preferentially sought. 16,17 Although the emerging solidstate H 2 storage method has been paid increasing attention, direct storage H 2 in high pressure tank or low temperature liquid state which have a higher energy density, high energy consumption, and latent unsafety are currently the main methods.…”

mentioning

confidence: 99%

Comparative investigation on feasible hydrolysis H ₂ production behavior of commercial Mg‐M (M = Ni, Ce, and La) binary alloys modified by high‐energy ball milling—Feasible modification strategy for Mg‐based hydrogen producing alloys

et al. 2020

View full text Add to dashboard Cite

The bulk Mg-M (M = Nickel [Ni], cerium [Ce], and Lanthanum [La]) alloys are successfully ameliorated by high-energy ball milling (HEBM) to modify the hydrolysis H 2 generation performance in simulated seawater solution (3.5 wt% NaCl). The H 2 generation kinetics, rate-limiting steps, thermodynamics and the hydrolysis mechanism are investigated by combining the fitting results of the hydrolysis curves and microstructures information. The results indicate that the as-cast Mg25Ni possesses higher generation capacity and faster initial rate. The capacities of as-cast Mg25Ni, Mg30Ce, and Mg30La alloys at 48 C within 180 minutes are 760 mL g −1 , 725 mL g −1 , and 525 mL g −1. The hydrolysis H 2 generation apparent activation energies of the as-cast Mg25Ni, Mg30Ce, and Mg30La alloys are 30.92, 17.05, and 28.04 kJÁmol −1 , respectively. The HEBM technique can elevate the hydrolysis performance of Mg-M alloys. And the highest H 2 producing capacity as high as 589 mL g −1 is obtained by HEBM Mg30La alloy at 48 C within 30 minutes. The hydrolysis apparent activation energies E a are 9.57, 14.65, and 23.88 kJ/mol for HEBM Mg25Ni, Mg30Ce, and Mg30La alloys. The initial rate and the final yield of H 2 generation for Mgbased alloys are affected by the activity of matrix alloy, microstructure, particle size, surface state, and many other factors. K E Y W O R D S H 2 production, HEBM, hydrogen generation mechanism, kinetics, Mg intermediate alloys 1 | INTRODUCTION Hydrogen is currently the most appealing option for fossil fuels in the future. The production of H 2 is the primary problem of hydrogen utilization. 1-5 The hydrogen-energy process chain is consisted by the hydrogen production 6 , hydrogen storage 7-10 and regeneration. 11-13 Nowadays, the wide usages of H 2 energy are still seriously prevented

show abstract

“…Among the emerging numerous energies (solar energy, wind energy, water energy, etc), hydrogen energy is considered to be an alternative for fossil fuels for its wide range of sources, high energy storage density, recyclability, and environment friendly. 2,3 To widely apply the hydrogen, the mature techniques of hydrogen generation, [4][5][6][7][8] hydrogen storage, 9,10 and hydrogen utilization should be exploited firstly. Among the three aspects, the hydrogen production technique is the primary task.…”

Section: Introductionmentioning

confidence: 99%

Catalytic effect of EG and MoS ₂ on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance

Hou

Wang

et al. 2019

Int J Energy Res

View full text Add to dashboard Cite

Summary In this study, the metallurgical melting Mg‐10wt.%Ni (Mg10Ni) alloy is firstly modified by high‐energy ball milling (HEBM) and then surface catalysts expanded graphite (EG) or MoS2 or EG‐MoS2 are introduced to prepare Mg10Ni‐M (M = EG, MoS2, and EG‐MoS2) composites. The effects of surface catalysts on hydrolysis hydrogen generation of HEBM Mg10Ni alloy are comprehensively investigated. Their kinetics, rate‐limiting steps, and apparent activation energies are investigated by fitting the hydrolysis curves at different temperatures. The results indicate that the total hydrogen generation capacities of prepared Mg10Ni‐M (M = EG, MoS2, and EG‐MoS2) composites are 200, 170, 674, and 720 mL·g−1 within 1 minute at 291 K. The capacity and yield of Mg10Ni are 500 mL·g−1 and 56% within 15 minutes. The surface catalysts EG or MoS2 or EG‐MoS2 can distinctly elevate the initial H2 produce rate and promote the complete hydrolysis process. The highest capacity and generation yield within 15 minutes are 740.8 mL·g−1 and 91% obtained by HEBM Mg10Ni‐EG‐MoS2 composite at 291 K. The surface catalysis can promote high generation yield of Mg10Ni alloy in a short time.

show abstract

Effect of MWCNTs and lithium modified MWCNTs on electrochemical hydrogen storage properties of Co0.9Cu0.1Si alloy

Cited by 31 publications

References 39 publications

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Comparative investigation on feasible hydrolysis H ₂ production behavior of commercial Mg‐M (M = Ni, Ce, and La) binary alloys modified by high‐energy ball milling—Feasible modification strategy for Mg‐based hydrogen producing alloys

Catalytic effect of EG and MoS ₂ on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance

Contact Info

Product

Resources

About

Effect of MWCNTs and lithium modified MWCNTs on electrochemical hydrogen storage properties of Co0.9Cu0.1Si alloy

Cited by 31 publications

References 39 publications

Preparation and electrochemical hydrogen storage properties of Co 9 S 8 alloy coated with cobalt/graphene composite

Preparation and electrochemical hydrogen storage properties of Co 9 S 8 alloy coated with cobalt/graphene composite

Comparative investigation on feasible hydrolysis H 2 production behavior of commercial Mg‐M (M = Ni, Ce, and La) binary alloys modified by high‐energy ball milling—Feasible modification strategy for Mg‐based hydrogen producing alloys

Catalytic effect of EG and MoS 2 on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance

Contact Info

Product

Resources

About

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Preparation and electrochemical hydrogen storage properties of Co ₉ S ₈ alloy coated with cobalt/graphene composite

Comparative investigation on feasible hydrolysis H ₂ production behavior of commercial Mg‐M (M = Ni, Ce, and La) binary alloys modified by high‐energy ball milling—Feasible modification strategy for Mg‐based hydrogen producing alloys

Catalytic effect of EG and MoS ₂ on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance