Among 2D materials, transition-metal dichalcogenides (TMDCs) of group 5 metals recently have attracted substantial interest due to their superior electrocatalytic activity toward hydrogen evolution reaction (HER). However, a straightforward and efficient synthesis of the TMDCs which can be easily scaled up is missing. Herein, we report an innovative, simple, and scalable method for tantalum disulfide (TaS 2 ) synthesis, involving CS 2 as a sulfurizing agent and Ta 2 O 5 as a metal precursor. The structure of the created TaS 2 flakes was analyzed by Raman, XRD, XPS, SEM, and HRTEM techniques. It was demonstrated that a tuning between 1T (metallic) and 3R (semiconductor) TaS 2 phases can be accomplished by varying the reaction conditions. The created materials were tested for HER, and the electrocatalytic activity of both phases was significantly enhanced by electrochemical self-activation, up to that comparable with the Pt one. The final values of the Tafel slopes of activated TaS 2 were found to be 35 and 43 mV/dec for 3R-TaS 2 and 1T-TaS 2 , respectively, with the corresponding overpotentials of 63 and 109 mV required to reach a current density of 10 mA/cm 2 . We also investigated the mechanism of flake activation, which can be attributed to the changes in the flake morphology and surface chemistry. Our work provides a scalable and simple synthesis method to produce transition-metal sulfides which could replace the platinum catalyst in water splitting technology.

A 43-year-old man, injured during a factory explosion on January 4, 2010, was transported to the nearest hospital. Volume resuscitation started, subclavian vein cannulation, chest tube, and covering of burns were performed. The intubated and ventilated patient was transferred by helicopter to our hospital. The leading diagnoses were: haemorrhagic-traumatic and burns shock, haemoperitoneum, pneumothorax, subtotal amputation of the left distal crus/feet, burns over 40 % of the body surface, right calcaneus fracture etc. Preliminary circulatory stabilisation with discontinuation of norepinephrine infusion was achieved within 10 hours, by excessive positive fluid balance, which took three days (22, 10 and 9 litres). Preliminary blood lactate 7 mmol/l was normalised within 24 hours. Blood albumin level 15 g/l was tolerated without any artificial replacement. The second hit appeared on day 10, in a form of septic shock caused by Aspergillus fumigatus infection from the lacerated left lower limb. High-volume continuous haemodiafiltration because of hyperpyrexia was used, after the exarticulation in the left knee-joint. An excessive proteolysis (urea loss more than 1000 mmol/day) persisted 1.5 months, with energy expenditure over 2600 kcal/day. The patient underwent multiple surgical interventions. Metabolic support using combined parenteral and enteral nutrition was performed during the first month, enteral nutrition combined with food were consequently given for more than 3 months. The patient was hospitalised until April 26, 2010. These types of traumas are fully comparable with military battlefield environment injuries. Principles of war surgery (life and limb saving, damage control surgery) should be applied also in civilian environment, particularly in disaster situations.