Hydride formation and dynamic phase changes during template-assisted Pd electrodeposition

被引：4

作者：

Abbondanza, Giuseppe ^{[1
]}

Grespi, Andrea ^{[2
,3
]}

Larsson, Alfred ^{[2
,3
]}

Dzhigaev, Dmitry ^{[2
,3
]}

Glatthaar, Lorena ^{[4
]}

Weber, Tim ^{[4
]}

Blankenburg, Malte ^{[5
]}

Hegedues, Zoltan ^{[5
]}

Lienert, Ulrich ^{[5
]}

Over, Herbert ^{[4
]}

Harlow, Gary S. ^{[6
,7
]}

Lundgren, Edvin ^{[2
]}

机构：

[1] Chalmers Univ Technol, Dept Phys, Chalmersplatsen 4, S-41296 Gothenburg, Sweden

[2] Lund Univ, Div Synchrotron Radiat Res, Professorsgatan 1, S-22363 Lund, Sweden

[3] Lund Univ, NanoLund, Professorsgatan 1, S-22363 Lund, Sweden

[4] Justus Liebig Univ, Inst Phys Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany

[5] Deutsch Elektronensynchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[6] Univ Oregon, Dept Chem & Biochem, Eugene, OR 97403 USA

[7] Univ Oregon, Oregon Ctr Electrochem, Eugene, OR 97403 USA

来源：

NANOTECHNOLOGY | 2023年 / 34卷 / 50期

基金：

瑞典研究理事会;

关键词：

hydrogen; palladium; electrodeposition; nano-porous anodic alumina; nanowires; x-ray scattering; synchrotron; HYDROGEN STORAGE; ANODIC ALUMINA; SN NANOPILLARS; PALLADIUM; GROWTH; TRANSFORMATIONS; SPECTROMETER; RESOLUTION; NANOWIRES; EVOLUTION;

D O I：

10.1088/1361-6528/acf66e

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigated the structural evolution of electrochemically fabricated Pd nanowires in situ by means of grazing-incidence transmission small- and wide-angle x-ray scattering (GTSAXS and GTWAXS), x-ray fluorescence (XRF) and two-dimensional surface optical reflectance (2D-SOR). This shows how electrodeposition and the hydrogen evolution reaction (HER) compete and interact during Pd electrodepositon. During the bottom-up growth of the nanowires, we show that beta-phase Pd hydride is formed. Suspending the electrodeposition then leads to a phase transition from beta-phase Pd hydride to alpha-phase Pd. Additionally, we find that grain coalescence later hinders the incorporation of hydrogen in the Pd unit cell. GTSAXS and 2D-SOR provide complementary information on the volume fraction of the pores occupied by Pd, while XRF was used to monitor the amount of Pd electrodeposited.

引用

页数：15

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