Random alloy and intermetallic nanocatalysts in fuel cell reactions

Zhang, Junming; Shen, Linfan; Jiang, Yanxia; Sun, Shi‐Gang

doi:10.1039/d0nr05475e

Cited by 34 publications

(31 citation statements)

References 210 publications

(228 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 32,48 ] As for EOR, the Co single atoms are beneficial for the oxidative removal of CO intermediates by facilitating the adsorption of OH − species, minimizing the poisoning effect of catalyst; [ 47 ] 2) Benefiting from the isolated Co‐anchors on Co‐N‐C substrate, the subsequently immobilized PtCo IMC nanoparticles are highly dispersed on the Co‐N‐C support at a typical size of sub‐5 nm, which are also highly desired in ORR and EOR catalysis. [ 14,49 ]…”

Section: Resultsmentioning

confidence: 99%

“…On one hand, PtCo IMCs are widely known as active sites for ORR and EOR catalysis. [14] On the other hand, the single-atom Co-N-C sites favor ORR and EOR in two aspects: 1) The abundant Co atoms in forms of CoN x in Co-N-C support are known as active sites for ORR electrocatalysis. [32,48] As for EOR, the Co single atoms are beneficial for the oxidative removal of CO intermediates by facilitating the adsorption of OH − species, minimizing the poisoning effect of catalyst; [47] 2) Benefiting from the isolated Co-anchors on Co-N-C substrate, the subsequently immobilized PtCo IMC nanoparticles are highly dispersed on the Co-N-C support at a typical size of sub-5 nm, which are also highly desired in ORR and EOR catalysis.…”

Section: Resultsmentioning

confidence: 99%

“…More significantly, in contrast to ordinary solid‐solution type Pt alloys, the ordered IMC PtM exhibit superior structural integrity. [ 14–17 ] For example, ordered IMCs, such as Pt 3 Cr, [ 18 ] PtBi, [ 19 ] and PtCo, [ 13,20 ] exhibit superior dissolution resistance to oxidation and etching in acidic media. On this topic, the fabrication of small IMC nanoparticles (NPs) with protective Pt‐skin shells via facile syntheses other than the commonly used two‐step annealing is highly desired.…”

Section: Introductionmentioning

confidence: 99%

“…[11] It has recently been proved that Pt-based structurally ordered intermetallic compounds (IMCs) have extraordinary electrocatalytic activities and durability due to their neat stoichiometric ratios and long-range orders. [12][13][14] The active sites of IMCs tend to be dispersed homogeneously on the surfaces of catalysts owing to their well-defined surface compositions. More significantly, in contrast to ordinary solid-solution type Pt alloys, the ordered IMC PtM exhibit superior structural integrity.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Gao

Zhou

Wang

et al. 2022

Small

View full text Add to dashboard Cite

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202202071. The development of low-Pt catalysts with high activity and durability is critical for fuel cells. Here, Pt-skin wrapped sub-5 nm PtCo intermetallic nanoparticles are successfully mounted on single atom Co-N-C support by exploiting the barrier effect of Co-anchor. According to a collaborative experimental and computational investigation, the increased oxygen reduction reaction activity of PtCo/Co-N-C arises from the direct electron transfer from PtCo to Co-N-C, and the resulting optimal d-band center of Pt. Owing to such unique electronic structure interaction and synergistic effect, the specific and mass activities of PtCo/Co-N-C are up to 4.20 mA cm −2 and 2.71 A mg Pt −1 , respectively, with barely degraded stability after 40 000 CV cycles. The PtCo/ Co-N-C also exhibits outstanding activity as an ethanol electrocatalyst. This work shows a new and effective route to boost the overall efficiency of direct ethanol fuel cells in acidic media by integrating intermetallic low-Pt alloys and single atom carbon support.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Gao

Zhou

Wang

et al. 2022

Small

View full text Add to dashboard Cite

show abstract

“…In recent years, there has been explosive growth in the study of Pt-based intermetallic nanocrystals for ORR, from theoretical calculation to experimental verification, from precise synthesis to excellent electrocatalytic properties (Figure 1) [12,[15][16][17][18]. Most of the reviews focus on the study of structure-activity relationship of intermetallic [12,16,19].…”

Section: Introductionmentioning

confidence: 99%

Pt-Based Intermetallic Nanocrystals in Cathode Catalysts for Proton Exchange Membrane Fuel Cells: From Precise Synthesis to Oxygen Reduction Reaction Strategy

Gao

Chen

et al. 2021

Catalysts

View full text Add to dashboard Cite

Although oxygen reduction reaction (ORR) catalysts have been extensively investigated and developed, there is a lack of clarity on catalysts that can balance high performance and low cost. Pt-based intermetallic nanocrystals are of special interest in the commercialization of proton exchange membrane fuel cells (PEMFCs) due to their excellent ORR activity and stability. This review summarizes the wide range of applications of Pt-based intermetallic nanocrystals in cathode catalysts for PEMFCs and their unique advantages in the field of ORR. Firstly, we introduce the fundamental understanding of Pt-based intermetallic nanocrystals, and highlight the difficulties and countermeasures in their synthesis. Then, the progress of theoretical and experimental studies related to the ORR activity and stability of Pt-based intermetallic nanocrystals in recent years are reviewed, especially the integrated strategies for enhancing the stability of ORR. Finally, the challenges faced by Pt-based intermetallic nanocrystals are summarized and future research directions are proposed. In addition, numerous design ideas of Pt-based intermetallic nanocrystals as ORR catalysts are summarized, aiming to promote further development of commercialization of PEMFC catalysts while fully understanding Pt-based intermetallic nanocrystals.

show abstract

Creating Atomic Ordering in Electrocatalysis

Lin

Jiang

Zhao

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Catalysis always proceeds in a chaotic fashion. Therefore, identifying the working principles of heterogeneous catalysts is a challenging task. Creating atomic order in heterogeneous catalysts simplifies this task and also offers new opportunities for rationally designing active sites to manipulate catalytic performance. The recent rapid advances in heterogeneous electrocatalysis have led to exciting progress in the construction of atomically ordered materials. Here, the latest progress in electrocatalysts with the periodic atomic arrangement, including intermetallic compounds with long‐range order and metal atom‐array catalysts with short‐range order is summarized. The synthesis principles and the intriguing physical and chemical properties of these electrocatalysts are discussed. Furthermore, the compelling prospects of atomically ordered catalysts in the frontier of catalyst research are outlined.

show abstract

Random alloy and intermetallic nanocatalysts in fuel cell reactions

Abstract: Fuel cells that use small organic molecules or hydrogen as anode fuel can power clean electric vehicles. From an experimental perspective, those possible fuel cells electrocatalytic reaction mechanisms are obtained...

Cited by 34 publications

References 210 publications

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Pt-Based Intermetallic Nanocrystals in Cathode Catalysts for Proton Exchange Membrane Fuel Cells: From Precise Synthesis to Oxygen Reduction Reaction Strategy

Creating Atomic Ordering in Electrocatalysis

Contact Info

Product

Resources

About