Electron Beam Transparent Boron Doped Diamond Electrodes for Combined Electrochemistry─Transmission Electron Microscopy
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2022-07-14 |
| Journal | ACS Measurement Science Au |
| Authors | Haytham E. M. Hussein, Georgia Wood, Daniel Houghton, Marc Walker, Yisong Han |
| Institutions | University of Warwick |
| Citations | 4 |
Abstract
Section titled “Abstract”The majority of carbon based transmission electron microscopy (TEM) platforms (grids) have a significant sp<sup>2</sup> carbon component. Here, we report a top down fabrication technique for producing freestanding, robust, electron beam transparent and conductive sp<sup>3</sup> carbon substrates from boron doped diamond (BDD) using an ion milling/polishing process. X-ray photoelectron spectroscopy and electrochemical measurements reveal the sp<sup>3</sup> carbon character and advantageous electrochemical properties of a BDD electrode are retained during the milling process. TEM diffraction studies show a dominant (110) crystallographic orientation. Compared with conventional carbon TEM films on metal supports, the BDD-TEM electrodes offer superior thermal, mechanical and electrochemical stability properties. For the latter, no carbon loss is observed over a wide electrochemical potential range (up to 1.80 V <i>vs</i> RHE) under prolonged testing times (5 h) in acid (comparable with accelerated stress testing protocols). This result also highlights the use of BDD as a corrosion free electrocatalyst TEM support for fundamental studies, and in practical energy conversion applications. High magnification TEM imaging demonstrates resolution of isolated, single atoms on the BDD-TEM electrode during electrodeposition, due to the low background electron scattering of the BDD surface. Given the high thermal conductivity and stability of the BDD-TEM electrodes, <i>in situ</i> monitoring of thermally induced morphological changes is also possible, shown here for the thermally induced crystallization of amorphous electrodeposited manganese oxide to the electrochemically active γ-phase.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 2015 - Nanocharacterization