Electrochemical Energy Conversion on Intermetallic Compounds: A Review

Rößner, Leonard; Armbrüster, Marc

doi:10.1021/acscatal.8b04566

Cited by 276 publications

(233 citation statements)

References 323 publications

(642 reference statements)

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“…On the other hand, some experimental methods have been reported to synthesize various intermetallics with designable electronic/geometric structures and advanced catalytic performances . Although many progresses regarding the intermetallic catalysts have been made, the majority of relevant researches focus on the intermetallics containing a combination of multiple metals . Additionally, despite their large number, structural diversity, and impressive physical properties (for example, superconductivity), the intermetallics with a combination of one or more metals with boron are less studied for catalysis applications.…”

Section: Figurementioning

confidence: 99%

Transition‐Metal–Boron Intermetallics with Strong Interatomic d–sp Orbital Hybridization for High‐Performance Electrocatalysis

Ai,

Zou,

Chen

et al. 2020

Angew Chem Int Ed

151

116

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A theoretical and experimental study gives insights into the nature of the metal–boron electronic interaction in boron‐bearing intermetallics and its effects on surface hydrogen adsorption and hydrogen‐evolving catalytic activity. Strong hybridization between the d orbitals of transition metal (TM) and the sp orbitals of boron exists in a family of fifteen TM–boron intermatallics (TM:B=1:1), and hydrogen atoms adsorb more weakly to the metal‐terminated intermetallic surfaces than to the corresponding pure metal surfaces. This modulation of electronic structure makes several intermetallics (e.g., PdB, RuB, ReB) prospective, efficient hydrogen‐evolving materials with catalytic activity close to Pt. A general reaction pathway towards the synthesis of such TMB intermetallics is provided; a class of seven phase‐pure TMB intermetallics, containing V, Nb, Ta, Cr, Mo, W, and Ru, are thus synthesized. RuB is a high‐performing, non‐platinum electrocatalyst for the hydrogen evolution reaction.

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Section: Figurementioning

confidence: 99%

Transition‐Metal–Boron Intermetallics with Strong Interatomic d–sp Orbital Hybridization for High‐Performance Electrocatalysis

Ai,

Zou,

Chen

et al. 2020

Angew Chem Int Ed

151

116

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“…Herein N is 35.2 AE 0.2% ( Fig. S1 †), calibrated by deaerated 0.1 M NaOH with 0.01 M K 3 Fe(CN) 6 at an electrode rotation speed of 1600 rpm with a scan rate of 5 mV s À1 . Liner sweep voltammograms for OER were obtained in 1 M KOH at a scan rate of 5 mV s À1 and a rotation speed of 1600 rpm.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

“…4 A wide range of alternate electrocatalyst with high activity, low cost and good stability are developed in the past a few years, with majority of them using a combination of metal oxides or suldes with heteroatomdoped carbons. 5,6 Nevertheless, unbalanced performance was obtained in most cases. A transition-metal-based truly bifunctional electrocatalyst with superior catalytic activities toward both ORR and OER is rare.…”

Section: Introductionmentioning

confidence: 98%

Reduced graphene oxide-supported cobalt oxide decorated N-doped graphitic carbon for efficient bifunctional oxygen electrocatalysis

Bao

Liu

et al. 2019

RSC Adv.

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A high-performance composite bifunctional electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) has been synthesized via in situ growth of a hybrid precursor of graphene oxide (GO) and cobalt-based zeolite imidazolium framework (ZIF-67) under hydrothermal condition, followed by calcination at elevated temperature. The as-prepared composite bifunctional catalyst is confirmed to possess a structure of N-GC/Co@CoO/rGO, with core-shell nanoparticles of Co@CoO encapsulated in nitrogen-doped graphitic carbon (N-GC) thin layers which are then overall supported by reduced graphene oxide (rGO) sheets. With N-GC furnishing high population of ORR active sites, CoO being active for OER which is further enhanced by a highly conductive metal core, rGO sheets enhancing the overall electronic conduction, as well as the multiple synergistic couplings in the composite materials, pronounced ORR and OER catalytic activities with superior stability have been achieved. The catalysts also showed excellent tolerance to the crossover effect to methanol, showing great potential in energy-related applications requiring efficient oxygen electrocatalysis.

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“…High‐cost and less‐abundant catalysts such as Ir and Ru oxides show state‐of‐the‐art activity towards OER, while Pt is most efficient HER catalyst known to date . There are many reports of cost‐effective HER catalysts, few of those being pH‐universal . The dearth of a Pt‐like activity is still hovering.…”

Section: Introductionmentioning

confidence: 99%

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

et al. 2020

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Five‐fold intertwined AgxNi1−x (x=0.01–0.25) heterogeneous alloy nanocrystal (NC) catalysts, prepared through unique reagent combinations, are presented. With only ca. 5 at % Ag (AgNi‐5), Pt‐like activity has been achieved at pH 14. To reach a current density of 10 mA cm−2 the extremely stable AgNi‐5 requires an overpotential of 24.0±1.2 mV as compared to 20.1±0.8 mV for 20 % Pt/C, both with equal catalyst loading of 1.32 mg cm−2. The turnover frequency (TOF) is as high as 2.1 H2 s−1 at 50 mV (vs. RHE). Site‐specific elemental analyses show the Ag:Ni compositional variation, where the apex and edges of the decahedra are Ag‐rich, thereby exposing Ni onto the faces to achieve maximum charge transport for an exceptional pH universal HER activity. DFT calculations elucidate the relative H‐atom adsorption capability of the Ni centers as a function of their proximity to Ag atom.

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Electrochemical Energy Conversion on Intermetallic Compounds: A Review

Cited by 276 publications

References 323 publications

Transition‐Metal–Boron Intermetallics with Strong Interatomic d–sp Orbital Hybridization for High‐Performance Electrocatalysis

Transition‐Metal–Boron Intermetallics with Strong Interatomic d–sp Orbital Hybridization for High‐Performance Electrocatalysis

Reduced graphene oxide-supported cobalt oxide decorated N-doped graphitic carbon for efficient bifunctional oxygen electrocatalysis

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

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