Dataset for 'Simultaneous Formation of FeOx Electrocatalyst Coating within Hematite Photoanodes for Solar Water Splitting'

Depositing an oxygen evolution electrocatalyst on the intricate pores of semiconductor light-absorbing layers of photoanodes for photoelectrochemical solar water splitting is an efficient way to improve their performance, but it adds extra costs and difficulties. Here details of collection methods and the analysis instrumentation are given. Also the raw data of hematite sample analysis and the data for photocurrent measurements and oxygen evolution data are provided.The techniques used were as follows: Electron Microscopy – SEM and TEM; X-ray diffraction – powder samples; Photoelectrochemistry – potentiostat and electrochemical cell linked to a calibrated solar simulator light source; X-ray photoelectron spectroscopy for surface analysis of element and oxidation states; UV-visible spectroscopy – analysis of organic compounds and bonding; Raman analysis – analysis of organic compounds and bonding; O2 evolution analysis – fluorescent probe. Powder samples were hand ground before mounting on sample holders for powder X-ray analysis, Raman and UV-visible spectroscopy. For TEM, samples were hand ground then briefly sonicated in propanol before a drop of the suspension was applied to formvar and carbon coated copper mesh grids. For all details see attached Data Collection Methods document and links to related publications.Hematite amples for SEM were prepared on electrically conductive ABS-FTO glass, gold sputter coating was therefore not required for SEM observation. Hematite samples for TEM were prepared by briefly sonicating a small amount of sample in propanol before one drop of the dilute suspension was places on carbon coated copper TEM grids. Hematite samples for XRD were prepared by hand grinding before placing in a powder sample holder disk and levelled

Dataset for 'Simultaneous Formation of FeOx Electrocatalyst Coating within Hematite Photoanodes for Solar Water Splitting'

Depositing an oxygen evolution electrocatalyst on the intricate pores of semiconductor light-absorbing layers of photoanodes for photoelectrochemical solar water splitting is an efficient way to improve their performance, but it adds extra costs and difficulties. Here details of collection methods and the analysis instrumentation are given. Also the raw data of hematite sample analysis and the data for photocurrent measurements and oxygen evolution data are provided

Evaluation of a quality improvement intervention to reduce anastomotic leak following right colectomy (EAGLE): pragmatic, batched stepped-wedge, cluster-randomized trial in 64 countries

Background Anastomotic leak affects 8 per cent of patients after right colectomy with a 10-fold increased risk of postoperative death. The EAGLE study aimed to develop and test whether an international, standardized quality improvement intervention could reduce anastomotic leaks. Methods The internationally intended protocol, iteratively co-developed by a multistage Delphi process, comprised an online educational module introducing risk stratification, an intraoperative checklist, and harmonized surgical techniques. Clusters (hospital teams) were randomized to one of three arms with varied sequences of intervention/data collection by a derived stepped-wedge batch design (at least 18 hospital teams per batch). Patients were blinded to the study allocation. Low- and middle-income country enrolment was encouraged. The primary outcome (assessed by intention to treat) was anastomotic leak rate, and subgroup analyses by module completion (at least 80 per cent of surgeons, high engagement; less than 50 per cent, low engagement) were preplanned. Results A total 355 hospital teams registered, with 332 from 64 countries (39.2 per cent low and middle income) included in the final analysis. The online modules were completed by half of the surgeons (2143 of 4411). The primary analysis included 3039 of the 3268 patients recruited (206 patients had no anastomosis and 23 were lost to follow-up), with anastomotic leaks arising before and after the intervention in 10.1 and 9.6 per cent respectively (adjusted OR 0.87, 95 per cent c.i. 0.59 to 1.30; P = 0.498). The proportion of surgeons completing the educational modules was an influence: the leak rate decreased from 12.2 per cent (61 of 500) before intervention to 5.1 per cent (24 of 473) after intervention in high-engagement centres (adjusted OR 0.36, 0.20 to 0.64; P < 0.001), but this was not observed in low-engagement hospitals (8.3 per cent (59 of 714) and 13.8 per cent (61 of 443) respectively; adjusted OR 2.09, 1.31 to 3.31). Conclusion Completion of globally available digital training by engaged teams can alter anastomotic leak rates. Registration number: NCT04270721 (http://www.clinicaltrials.gov)