Search Results

You searched for all publications:

with publication states 'Published (Approved)'

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

Exact matches
Related results

2 items found (0 items not approved), displaying all items.1

Instruments / Technical Area	Publication Details	Published	Actions
E02-JEM ARM 300CF	Bifunctional single atom electrocatalysts: coordination–performance correlations and reaction pathways Wenchao Wan , Carlos A. Triana , Jinggang Lan , Jingguo Li , Christopher S. Allen , Yonggui Zhao , Marcella Iannuzzi , Greta R. Patzke Acs Nano DOI: 10.1021/acsnano.0c05088 Diamond Proposal Number(s): [16967] Show Abstract ▼ Abstract: Single atom catalysts (SACs) are ideal model systems in catalysis research. Here we employ SACs to address the fundamental catalytic challenge of generating well-defined active metal centers to elucidate their interactions with coordinating atoms, which define their catalytic performance. We introduce a soft-landing molecular strategy for tailored SACs based on metal phthalocyanines (MPcs, M = Ni, Co, Fe) on graphene oxide (GO) layers to generate well-defined model targets for mechanistic studies. The formation of electronic channels through π–π conjugation with the graphene sheets enhances the MPc-GO performance in both oxygen evolution and reduction reactions (OER and ORR). Density functional theory (DFT) calculations unravel that the outstanding ORR activity of FePc-GO among the series is due to the high affinity of Fe atoms toward O2 species. Operando X-ray absorption spectroscopy and DFT studies demonstrate that the OER performance of the catalysts relates to thermodynamic or kinetic control at low- or high-potential ranges, respectively. We furthermore provide evidence that the participation of ligating N and C atoms around the metal centers provides a wider selection of active OER sites for both NiPc-GO and CoPc-GO. Our strategy promotes the understanding of coordination–activity relationships of high-performance SACs and their optimization for different processes through tailored combinations of metal centers and suitable ligand environments.	Oct 2020
I09-Surface and Interface Structural Analysis	Valleys and hills of graphene on Ru(0001) Caio C. Silva , Marcella Iannuzzi , David A. Duncan , Paul Ryan , Katherine T. Clarke , Johannes T. Kuchle , Jiaqi Cai , Wouter Jolie , Christoph Schlueter , Tien-Lin Lee , Carsten Busse The Journal Of Physical Chemistry C DOI: 10.1021/acs.jpcc.8b05671 Diamond Proposal Number(s): [12558, 16796] Show Abstract ▼ Abstract: The structure of graphene on Ru(0001) has been extensively studied over the last decade, yet with no general agreement. Here we analyse graphene's valleys and hills using a combination of x-ray standing waves (XSW) and density functional theory (DFT). The chemical specicity of XSW allows an independent analysis of valleys and hills which, together with DFT model, results in the precise determination of the distance between the at, strongly bonded valleys of graphene and the substrate, as well the corrugation presented in the weakly bounded hills. From the theoretical viewpoint, the good agreement with experiment validates the choices regarding the unit cell size and the non-local correlation functional.	Jul 2018

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User