Theoretical Modelling and Facile Synthesis of a Highly Active Boron‐Doped Palladium Catalyst for the Oxygen Reduction Reaction

Doan, Tat Thang Vo; Wang, Jingbo; Poon, Kee Chun; Tan, Desmond C. L.; Khezri, Bahareh; Webster, Richard D.; Su, Haibin; Sato, Hirotaka

doi:10.1002/anie.201601727

Cited by 98 publications

(83 citation statements)

References 65 publications

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“…Pd‐based alloy NPs have been developed mainly by combination with d‐block elements such as Pd–Co, Pd–Ni, Pd–Cu, Pd–Ru, Pd–Rh, Pd–Ag, Pd–Pt, Pd–Au, etc. On the other hand, alloy NPs composed of Pd and light p‐block elements including B, C, or P, have also attracted much attention as functional nanomaterials. Boron is light and possesses covalent bonding character.…”

Section: Figurementioning

confidence: 99%

Discovery of Hexagonal Structured Pd–B Nanocrystals

Kobayashi

Maesato

et al. 2017

Angew Chem Int Ed

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We report on hexagonal close-packed (hcp) palladium (Pd)-boron (B) nanocrystals (NCs) by heavy B doping into face-centered cubic (fcc) Pd NCs. Scanning transmission electron microscopy-electron energy loss spectroscopy and synchrotron powder X-ray diffraction measurements demonstrated that the B atoms are homogeneously distributed inside the hcp Pd lattice. The large paramagnetic susceptibility of Pd is significantly suppressed in Pd-B NCs in good agreement with the reduction of density of states at Fermi energy suggested by X-ray absorption near-edge structure and theoretical calculations.

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Section: Figurementioning

confidence: 99%

Discovery of Hexagonal Structured Pd–B Nanocrystals

Kobayashi

Maesato

et al. 2017

Angew Chem Int Ed

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“…These lower binding energies reduced the reaction barrier of the rate determining step of ORR and resulted in higher catalytic activity for the B doped Pd (Pd-B). [102] This thesis strongly believe that the results reported in the previously mentioned work was observed here as well. From the XRD image in Figure 9, there was a downward shift in Bragg's angle (0.9 o ) when comparing the amorphous Pd-P (39.3 o ) to the crystalline Pd-N 2 H 4 (40.2 o ).…”

Section: Importance Of Amorphous Nature and Industrial Application Ofsupporting

confidence: 87%

Electrohemical synthesis of high active palladium-based catalysts for fuel cell

Poon¹

Self Cite

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This thesis presents a facile and simple stepwise electroless deposition method for the synthesis of palladium nanoparticles for fuel cell application. The palladium nanoparticles synthesized by the proposed method exhibited high specific and mass activity for both oxygen reduction reaction and formic acid oxidation compared to commercial platinum and palladium loaded carbon. In particular, the amorphous palladium-phosphorus nanoparticles exhibited the highest specific and mass activity reported in literature so far. For oxygen reduction reaction, the palladium-phosphorus nanoparticles had a specific and mass activity of 6.85 mA cm-2 and 2.21 mA µg-1 respectively which were 4.5 and 2.6 times greater than previously reported values. Furthermore for formic acid oxidation, the palladium-phosphorus nanoparticles had a specific and mass activity of 5.7 mA cm-2 and 2.9 mA µg-1 respectively which were also higher than any previously reported literature values. The palladium nanoparticles where also shown to be more durable than commercial platinum and palladium loaded carbon. Furthermore, the palladium nanoparticles synthesized by the proposed method were also demonstrated to be industrial applicable. Lastly, the proposed synthesis method was also implemented in coating carbon nanotubes with palladium nanoparticles to make a palladium nanoparticles-carbon nanotubes composite. This palladium nanoparticles-carbon nanotubes composite was shown to be able to increase the catalytic and mass activity of bilirubin oxidase in oxygen reduction reaction compared to carbon nanotubes alone. Furthermore, this palladium nanoparticlescarbon nanotubes composite was also demonstrated to be able to increase the electron transfer rate between the bilirubin oxidase and the electrode (99.2 s-1 to 169.4 s-1).

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“…[10] On the other hand, doping an onmetallic element such as boron to Pd-based catalysts is also an attractive strategy for achieving high electrocatalytic performance. [11] The incorporation of boron into the metal lattices would downshift the dband center of metal owing to the electron transfer between the d orbitalo ft he metal and the p orbitalo fb oron. [12] Inspired by this idea, it is highly desired to develop af acile and mild synthetic method for the synthesis of boron-dopedm ultimetallicn anocrystals with dendritic nanostructures for the FAOR.…”

Section: Introductionmentioning

confidence: 99%

Boron‐Doped PdCuAu Nanospine Assembly as an Efficient Electrocatalyst toward Formic Acid Oxidation

Wang

Qian

Liu

et al. 2020

Chemistry A European J

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Control of the composition and morphology of Pd‐based electrocatalysts is a promising strategy for the development of efficient direct formic acid fuel cells. Herein, a two‐step method is presented for the design of B‐doped PdCuAu nanospine assemblies (B‐PdCuAu NAs) using NaBH4 as the boron dopant. The boron content can be tailored easily by tuning the reaction time, and an optimal boron content is beneficial to promote the formic acid oxidation reaction. Such B‐PdCuAu NAs exhibit superior mass and specific activities to commercial Pd black and PdCuAu NAs in alkaline solution. The excellent catalytic performance of B‐PdCuAu NAs may arise from the increase in surface active sites and the electronic effect of boron modification. This work provides a facile synthesis of the B‐doped metallic catalysts and highlights the boron modification in improving their performance as anode electrocatalysts for fuel cells.

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Theoretical Modelling and Facile Synthesis of a Highly Active Boron‐Doped Palladium Catalyst for the Oxygen Reduction Reaction

Cited by 98 publications

References 65 publications

Discovery of Hexagonal Structured Pd–B Nanocrystals

Discovery of Hexagonal Structured Pd–B Nanocrystals

Electrohemical synthesis of high active palladium-based catalysts for fuel cell

Boron‐Doped PdCuAu Nanospine Assembly as an Efficient Electrocatalyst toward Formic Acid Oxidation

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