Design and analysis of compact hotbox for solid oxide fuel cell based 1 kW-class power generation system

Rashid, Kashif; Dong, Sang Keun; Mehran, Muhammad Taqi; Lee, Jun Young

doi:10.1016/j.apenergy.2017.09.091

Cited by 18 publications

(3 citation statements)

References 43 publications

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“…A similar contribution was made by Tulloch et al 124 who worked on La 1 − x Sr x MnO 3 type perovskite for even values of X (0‐1) and found La 0.4 Sr 0.6 MnO 3 to be most active towards ORR. The catalyst was found to be quite crystalline with low surface area (<1 m 2 g −1 ) and a high degree of porosity 55,125,126 . It was found that as manganese approaches its valance state Mn 4+ , the Sr 2+ doping enhances the electrical conductivity of the catalyst, thus, increasing the catalytic activity, with the catalyst discovered to be more active at Mn 4+ .…”

Section: Review Of Perovskite Catalysts For Oer/orr and Hersmentioning

confidence: 99%

Role of perovskites as a bi‐functional catalyst for electrochemical water splitting: A review

et al. 2020

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The electrochemical water splitting by using renewable electricity is being considered as a sustainable, clean and considerable source of hydrogen fuel for future transportation and energy applications. The sluggish kinetics at anode and cathode, thus, require plenty of research work on the development of an efficient and stable electrocatalyst, which would provide the enhanced activity of water splitting reaction as well as stability for long-term operation. This review draws a detailed sketch of the progress in the pursuit of replacing noble metals with non-precious perovskite-based substitutes without compromising the key electrocatalyst characteristics. Herein, we critically analysed the latest research work and progress of perovskite oxides for anodic/oxygen reduction reaction/cathodic, including the mechanism behind perovskite oxide catalytic reactions, controlled composition as well as the role of various design strategies to achieve high catalytic performance. Moreover, the article also provides an insight to the associated density functional theory that can provide profound understanding of mechanism, involved behind these reactions and, the need for computational studies to exploit the active area of catalysts. It is believed that this article will assist researchers to explore key area of research in the current generation perovskites that show enhanced catalytic performance as well as to work on unforeseen challenges.

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Section: Review Of Perovskite Catalysts For Oer/orr and Hersmentioning

confidence: 99%

Role of perovskites as a bi‐functional catalyst for electrochemical water splitting: A review

et al. 2020

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“… 27 , 28 Recently, robust, earth-abundant, and cheap transition metal dichalcogenides (TMDs) with a general formula of MX 2 (M = transition metal, X = chalcogen) have been uncovered, showing promising electrocatalytic activity. 29 − 32 Amid these TMDs, MoS 2 has grabbed attention due to its high theoretical catalytic activity, low cost, and greater electrochemical stability. However, it is well known that the two major constraints that limit the further enhancement of MoS 2 activity are the low electrical conductivity and highly inert basal plane of MoS 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Typically, noble metal-based catalysts such as IrO 2 , RuO 2 , and Pt are considered the most efficient catalysts for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). − However, the terrestrial scarcity and high material cost of these noble catalysts have limited their use as electrocatalysts. , Recently, robust, earth-abundant, and cheap transition metal dichalcogenides (TMDs) with a general formula of MX 2 (M = transition metal, X = chalcogen) have been uncovered, showing promising electrocatalytic activity. − Amid these TMDs, MoS 2 has grabbed attention due to its high theoretical catalytic activity, low cost, and greater electrochemical stability. However, it is well known that the two major constraints that limit the further enhancement of MoS 2 activity are the low electrical conductivity and highly inert basal plane of MoS 2 . − − These shortcomings have been curbed through immense research in which 2H-MoS 2 (i.e., a semiconductor with a band gap of about 1.9 eV) is replaced with nanostructured 1T-MoS 2 with 10 7 times more conductive because the 4D orbital in 1T-MoS 2 is incompletely filled. , Supporting MoS 2 with highly conductive nanomaterials like graphene sheets, carbon nanotubes, nanocages, and nanofibers further aids in the enhancement of the HER and OER performance. − …”

Section: Introductionmentioning

confidence: 99%

Reutilizing Methane Reforming Spent Catalysts as Efficient Overall Water-Splitting Electrocatalysts

et al. 2021

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It is extremely prudent and highly challenging to design a greener bifunctional electrocatalyst that shows effective electrocatalytic activity and high stability toward electrochemical water splitting. As several hundred tons of catalysts are annually deactivated by deposition of carbon, herein, we came up with a strategy to reutilize spent methane reforming catalysts that were deactivated by the formation of graphitic carbon (GC) and carbon nanofibers (CNF). An electrocatalyst was successfully synthesized by in situ deposition of noble metal-free MoS 2 over spent catalysts via a hydrothermal method that showed exceptional performance regarding the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). At 25 mA cm –2 , phenomenal OER overpotentials (η 25 ) of 128 and 154 mV and modest HER overpotentials of 186 and 207 mV were achieved for MoS 2 @CNF and MoS 2 @GC, respectively. Moreover, OER Tafel slopes of 41 and 71 mV dec –1 and HER Tafel slopes of 99 and 107 mV dec –1 were obtained for MoS 2 @CNF and MoS 2 @GC, respectively. Furthermore, the synthesized catalysts exhibited good long-term durability for about 18 h at 100 μA cm –2 with unnoticeable changes in the linear sweep voltammetry (LSV) curve of the HER after 1000 cycles. The carbon on the spent catalyst increased the conductivity, while MoS 2 enhanced the electrocatalytic activity; hence, the synergistic effect of both materials resulted in enhanced electrocatalysts for overall water splitting. This work of synthesizing enhanced nanostructured electrocatalysts with minimal usage of inexpensive MoS 2 gives a rationale for engineering potent greener electrocatalysts.

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Highly thermal integrated heat pipe-solid oxide fuel cell

et al. 2018

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Design and analysis of compact hotbox for solid oxide fuel cell based 1 kW-class power generation system

Cited by 18 publications

References 43 publications

Role of perovskites as a bi‐functional catalyst for electrochemical water splitting: A review

Role of perovskites as a bi‐functional catalyst for electrochemical water splitting: A review

Reutilizing Methane Reforming Spent Catalysts as Efficient Overall Water-Splitting Electrocatalysts

Highly thermal integrated heat pipe-solid oxide fuel cell

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